COMET IoT Sensor plus

Introduction

The Sigfox network is used to transmit very short data messages and is optimized for low power consumption. It operates in the unlicensed radio band, which brings cheaper traffic but also legislative restrictions; messages cannot be sent faster than with a 10-minute interval.

Ideal applications for transmitters working in the Sigfox network are those where sending measured values at longer intervals (e.g., 1 hour or longer) is sufficient. Conversely, inappropriate applications are those where fast system response (less than 10 minutes) is required.

The WX8xx series transmitters for the SIGFOX network are designed to measure:

• Temperature
• Relative air humidity
• Atmospheric pressure
• CO2 concentration in air

The transmitter performs a measurement every 1 minute. The measured values are displayed on the LCD and are sent over an adjustable time interval (10 min to 24 hours) via radio transmission in the Sigfox network to the cloud data store. Through a common web browser, the cloud allows viewing of both actual and historical measured values. Transmitter setup is done either by computer (locally, via communication cable) or remotely via the cloud web interface.

For each measured variable, it is possible to set two alarm limits. The alarm is signaled by symbols on the LCD display and by sending an extraordinary radio message to the Sigfox network, which is forwarded to the end user by e-mail or SMS message. Extraordinary messages can also be sent by the transmitter if the binary input state is changed (if equipped).

The device is powered by an internal Li battery whose lifetime is dependent on the transmission range and operating temperature, ranging from 4 months to 7 years. Battery status information is on the display and in each sent message.

The Wx8xx series transmitters are designed with increased resistance to external influences (especially water protection); refer to technical data. Operation without an internal battery (with external power only) is not possible.

Safety Precautions and Prohibited Handling

Read the following safety precautions carefully before using the appliance, and keep them in mind during use!

• The device includes a radio transmitter operating in the non-license frequency band with the power specified in the Technical Parameters. This band and performance are used in the countries of the European Union. If you are in another location, ensure you can use the device before turning it on for the first time.
• Do not use the device in places where the use of mobile phones is restricted, such as near sensitive medical devices, on aircraft, or in places where blasting is taking place.
• Observe the authorized storage and operating conditions listed in the Technical Specifications. Avoid subjecting the unit to temperatures above 60 °C. Do not expose it to direct sunlight, including solar radiation. To comply with RF exposure requirements, a minimum separation distance of 20 cm must be maintained between the user's body and the device, including the antenna.
• It is forbidden to use the transmitter in a hazardous environment, especially in areas with the risk of explosion of flammable gases, vapors, and dust.
• It is forbidden to operate the unit without a cover. After replacing the battery or changing instrument settings using the SP003 cable, check the seal integrity and screw the device with the original screws. Always follow the instructions in this manual carefully.
• Do not expose the device to aggressive environments, chemicals, or mechanical shock. Use a soft cloth to clean. Do not use solvents or other aggressive agents.
• Do not attempt to service the device yourself. Any repairs may only be performed by trained service personnel. If the device exhibits unusual behavior, unscrew the device cap and remove the battery. Contact the distributor from whom you purchased the device.
• The device uses wireless communications and SIGFOX networks. For this reason, the connection cannot always be guaranteed under all circumstances. Never rely exclusively on wireless devices for critical communication purposes (e.g., rescue systems, security systems). Keep in mind that redundancy is required for systems with high operational reliability. More detailed information can be found in IEC 61508.
• The device contains a special type of battery with parameters different from conventional AA batteries. Use the type recommended by the manufacturer in the Technical Parameters (Tadiran SL-2770/S, 3.6 V, C size).
• Replace the battery only with a person who knows the principles of safe handling of lithium primary batteries. Dispose of used batteries as hazardous waste. In any case, do not throw them into a fire, expose them to high temperatures, low air pressure, or mechanically damage them.
• Only use the manufacturer's recommended accessories.

Installation

Installation, commissioning, and maintenance must only be carried out by a qualified person in accordance with applicable regulations and standards.

Device Mounting

For optimal operation of the Wx8xx Series, it is necessary to ensure their vertical position, usually by screwing them onto a wall or other suitable vertical surface at the place of installation. The sensor boxes are provided with 4.3 mm diameter holes for fastening with suitable screws. The holes are accessible after removing the cover. Fix the device firmly only after verifying the reception of the radio signal at the required installation location (see chapter "Switching the device on").

Basic placement rules:

• Always install the transmitters vertically, with the antenna cover up, at least 10 cm away from all conductive objects.
• Do not install the devices in underground areas (where the radio signal is generally unavailable). In these cases, it is preferable to use the model with an external probe on the cable and place the device itself, for example, one floor above.
• The devices and all cables (probes, binary inputs) should be placed away from electromagnetic interference sources.
• For temperature and relative humidity transmitters, or their probes, place them so that the measured values are not affected by accidental heat sources (sunshine, etc.) and unwanted airflow.

Optimal positioning of the transmitter in terms of radio range:

All materials absorb radio waves if they must pass through them. The most significant materials in terms of radio wave propagation are metal objects, concrete, reinforced concrete, and walls. If you install the device at a greater distance from the base station or in locations where the radio signal is difficult to penetrate, observe the following recommendations:

• Place the device as high as possible, with the antenna in open space rather than near a wall.
• In rooms, place the device at least 150 cm above the floor and, if possible, not directly on the wall. For safety reasons, do not exceed the installation height of 2 m above the floor (the fall of an insufficiently attached device can be dangerous).
• Place the device at a sufficient distance (at least 20 cm) away from all obstacles that could cause attenuation of the radio waves, and at least 20 cm from neighboring devices if you use multiple devices.
• Lead the cables of the external measuring probes and the external power first down to a distance of at least 40 cm from the instrument. If the cable is too long, install it as shown in the figure.
• Do not use probes with a cable shorter than 1 m.

Switching the device on

The device is supplied with the battery installed but in an off state. The CONFIGURATION button is used to turn on the device:

• Models without a waterproof cover (W0841E, W6810, W8810) have a CONFIGURATION button accessible via a paper clip through the hole on the top of the device.
• Waterproof models (W0841, W0846, W8861) have a CONFIGURATION button under the cover. Unscrew the four screws at the corners of the box and remove the cover.
• Press the CONFIGURATION button and release it as soon as the LCD lights up (for approximately 1 second).
• Perform the installation and, if necessary, set up the device (see chapter "Device usage and settings").
• Finally, carefully screw on the cover. For waterproof models, ensure the gasket in the housing groove is correctly positioned.

Device display

The LCD displays various indicators:

• Radio connection indicator: Shows the result of the bi-directional radio connection check with the cloud (daily). Remains lit if successful. Lights up after 24h on first power-up (requires good signal). Can light up sooner if the user manually enters setting mode. If remote setting is disabled, this indicator remains off.
• Device setup mode is in progress: Indicates when the device is in setup mode.
• ALARM: Indicates an active alarm on any channel.
• Low battery: Illuminates if the battery is weak; flashes if the battery is in critical condition.
• Sending / Receiving: Indicates data transmission and reception status.
• Measured value (upper row): Displays measured data for channels 1 and 2.
• Measured value (lower row): Displays measured data for channels 3 and 4.
• Units: Displays units such as °C, °F, hPa, CO2 ppm, %RH, DP, DIF, MIN.

The display cycles through information in three steps:

1. Step 1 (4 sec): Shows data on measured quantities on channels No.1 and No.2 (e.g., temperature and relative humidity).
2. Step 2 (4 sec): Shows data on measured quantities on channels No.3 and No.4 (e.g., CO2 concentration and dew point temperature).
3. Step 3 (2 sec): Shows service information about the time of sending regular messages and external power supply status.

P (Power): Indicates the presence of external power supply, refreshed every minute.

8x: Shows how many times the regular message will be sent before a new transmitter setup is applied from the cloud. This value decreases with each report. Reading new settings occurs when the display shows "1x 0 min". If remote setting is disabled, this value is not displayed.

30 min: Indicates the time in minutes until a regular message with measured values is sent. This value decreases every minute.

Device usage and settings

Factory setting

• Message sending interval: 10 minutes
• Alarms: deactivated
• Remote setting: enabled
• For devices with pressure measurement: altitude set to 0 m (displays absolute atmospheric pressure).

Working with the cloud

Viewing measured values

The cloud is an internet storage of data. You need a PC with an internet connection and a web browser. Navigate to your cloud address and sign in. If using COMET Cloud, visit www.cometsystem.cloud and follow the instructions on the provided Registration Card.

Each transmitter is identified by its unique address (device ID) in the Sigfox network. The transmitter's ID and serial number are printed on the nameplate. In your cloud device list, select the device with the desired ID to view measured values.

Checking the signal quality during device installation

The device, in factory default settings, sends measured values every 10 minutes. Check the cloud for received messages. Place the device temporarily at the intended location and check the radio signal quality in COMET Cloud by selecting the device in "My Devices" and then "Installation". For signal problems, refer to the "Problems with receiving radio messages" chapter.

Change of device settings remotely

The transmitter can be set remotely from the cloud if the cloud service supports this feature. In COMET Cloud, select the device in "My Devices" and then "Configure". Set the desired sending interval (note that shorter intervals decrease battery life), alarm limits, delays, hysteresis, or pressure altitude correction (for models with pressure measurement). Save the new settings; the device will accept them within 24 hours.

To speed up the setting process for a new transmitter, press the CONFIGURATION button (device must be switched on). The setting symbol ⚙️ will light up, and the device will start transmitting the new setting from the cloud within 10 minutes. The transmission itself may take up to 40 minutes depending on the range. This function can only be used once every 24 hours.

The location of the CONFIGURATION button varies by transmitter model; refer to the "Switching the device on" chapter for details.

Working with the COMET Vision SW

Change of device settings by connecting to a PC

The transmitter can be set directly from a PC using the COMET Vision software and the Communication Cable SP003 (optional accessory). The COMET Vision software and its installation manual are available at www.cometsystem.com.

Unscrew the device cover, connect it to the SP003 cable via the computer's USB port. Start the COMET Vision program and configure the device. After saving the settings, unplug the cable and carefully screw the device cover back on. For waterproof devices, ensure the seal is correctly positioned.

Warning: Do not leave the communication cable SP003 connected to the transmitter if the cable is not connected to the PC USB port or if the PC is switched off. Battery consumption will increase unnecessarily.

Alarm functions

The transmitter sends measured values in regular messages according to the set sending interval. Additionally, it can send extraordinary alarm messages when a new alarm is generated on a tracked channel or an active alarm is extinguished. This feature allows for extended battery life by using longer sending intervals for regular messages, while keeping the user informed of alarm status changes via extraordinary messages.

Overview of transmitter properties for correct alarm function settings:

• Two alarms can be set for each channel (or measured quantity).
• Each alarm has an adjustable limit, direction of exceeding the limit, delay, and hysteresis.
• Alarm delay can be set to 0, 1, 5, or 30 minutes (except for the CO2 channel, which has adjustable delay only to 0 or 30 minutes).
• The longer the sending interval for regular messages, the greater the battery capacity saved.
• After a new alarm is triggered or an alarm ends, an extraordinary alarm message is sent within 10 minutes at the latest. Temporary interruption of the current alarm (max. 10 min) is not indicated.
• The content of both regular and extraordinary alarm messages is identical, containing measured values of all channels and current alarm states.
• No short-term alarm (1 to 10 min duration) will be lost; the information will be sent no later than 10 minutes even if the alarm is currently inactive. The alarm message includes the maximum or minimum value measured during the alarm duration.
• Due to regulations for the unlicensed radio band, the device cannot send messages faster than every 10 minutes. If the device has the fastest sending interval (10 minutes), no extraordinary alarm messages can be sent.

Examples of sent alarm messages triggered by changes in the measured value (e.g., temperature)

Device configuration example:

• Sending interval: 30 min
• Alarm for channel temperature: ON
• Alarm activation: value is greater than limit
• Limit of alarm: any value
• Delay of alarm: none
• Hysteresis: 0 °C

After a new alarm is triggered, an extraordinary alarm message is sent within 10 minutes. Temporary interruption of the current alarm (max. 10 min) is not indicated. After the alarm ends, an extraordinary alarm message is sent within 10 minutes.

Manufactured models

COMET's Wx8xx transmitters differ in the type of measured quantities (temperature, relative humidity, atmospheric pressure, CO2 concentration) and the location of the sensors (compact design with internal sensors or external probes on the cable). The enclosure houses electronic circuits, internal sensors, and one or two batteries. Depending on the type, devices are fitted with connectors, and the antenna is protected by a cap.

Features overview of individual models:

W0841: Four inputs transmitter for external Pt1000 probes with Elka connector

Measures temperature from four external Pt1000/E probes (probe not included). Response to temperature changes is faster than models with internal sensors. Used for monitoring locations where only a measuring probe is installed and the device is in a suitable radio range location. Maximum recommended probe length is 15 m. Increased protection against external influences (dust, water, humidity). Unused inputs must be fitted with supplied connector caps.

W0841E: Four inputs transmitter for external Pt1000 probes with Cinch connector

Measures temperature from four external Pt1000/C probes (probe not included). Response to temperature changes is faster than models with internal sensors. Used for monitoring locations where only a measuring probe is installed and the device is in a suitable radio range location. Maximum recommended probe length is 15 m. Equipped with an external power input.

W0846: Three inputs transmitter for external thermocouple probes and with internal temperature sensor

Measures temperature from three external K-type thermocouple probes (NiCr-Ni) and ambient temperature using a built-in sensor. Response to temperature changes is faster than Pt1000 probes. Response of the built-in sensor to ambient temperature changes is relatively slow. Probes are not part of the device. Inputs for probes are not galvanically separated; ensure probe leads and junctions are not connected to other conductive elements to avoid measurement errors. Avoid installing near airflow (AC outlets, fans) or radiant heat. Increased protection against external influences (dust, water, humidity) and a slot for a second battery.

Connection method: Thermocouple probes must be connected with correct polarity (red wire to minus, yellow wire to plus). Use a 2.5x0.4 mm flat screwdriver. Tighten cable glands to seal cables. Do not use probes with braided jackets if waterproofing is required. Insert plugs into unused glands to seal the device.

W6810: Compact temperature, relative humidity and CO2 concentration transmitter

Measures temperature, relative humidity, and dew point temperature using internal sensors under a cap with a stainless-steel air filter. CO2 concentration is measured by an internal sensor via vents at the top. Characterized by a simple compact design but a longer response to temperature changes than external probe models. Placed directly into the measured area. Equipped with an external power input.

W8810: Compact temperature and CO2 concentration transmitter

Measures temperature and CO2 concentration using internal sensors via vents at the top. Characterized by a simple compact design but a longer response to temperature changes than external probe models. Placed directly into the measured area. Equipped with an external power input and a slot for a 2nd battery for extended operation.

W8861: Transmitter with input for external probe measuring CO2 concentration, with internal temperature and atmospheric pressure sensors

Measures temperature and atmospheric pressure from built-in internal sensors, and CO2 concentration from an external CO2Rx/E series probe (not included). Allows for higher CO2 concentrations and faster response compared to internal CO2 sensors. Conversely, temperature response is relatively slow. CO2Rx/E probes provide calibrated readings and are interchangeable. Maximum recommended probe length is 4 m. Increased protection against external influences (dust, water, humidity) and a slot for a 2nd battery.

Application notes

Operation of transmitter in various applications

Prior to commissioning, assess its suitability for the purpose, determine optimum settings, and prepare metrological and functional control if part of a larger system.

Inappropriate and risky applications:

The transmitter is not intended for applications where its failure could directly endanger lives or health of persons/animals, or the function of life-support devices. For applications where failure could result in serious property damage, supplement the system with an independent signaling device that evaluates status and prevents damage (see "Safety precautions and forbidden handling").

Device location:

Follow guidelines. If possible, select a location minimally affected by external environmental influences. If measuring in fridges, metal boxes, or chambers, place the device outside the exposed area and insert external probes only.

Location of temperature sensors:

Place in areas with sufficient airflow and where the most critical location is anticipated. The probe must be sufficiently inserted or connected to the measured area to prevent influence from undesirable heat supply on wires. In air-conditioned stores, do not place the sensor in the direct airflow. In large refrigerators, temperature distribution can be inhomogeneous (deviations up to 10 °C). Similar deviations occur in deep-freeze boxes.

Location of humidity sensors:

Depends on application requirements. Measuring moisture in refrigerators without stabilization is problematic. Cooling on/off cycles can cause significant humidity changes (tens of percent). Humidity condensation on chamber walls is common.

Measurement of calculated humidity variables

The instrument provides dew point temperature. Further calculated humidity quantities can be obtained via further data processing in SW.

Technical parameters

Power supply

The device is powered by one or two internal lithium batteries, accessible after unscrewing the cover. Some models can also be powered from an external source, with the internal battery serving as a backup. Operation without an internal battery (external power only) is not possible.

Power batteries

• Battery type: Lithium battery 3.6 V, C size, 8.5 Ah
• Recommended type: Tadiran SL-2770/S, 3.6 V, 8.5 Ah

Battery life:

*) For models W8810, W8861 and W0846 only.

The values given are valid for operation in the temperature range -5 to +35 °C. Frequent operation outside this range reduces battery life by up to 25%.

These values apply when extraordinary alarm messages are not used or only exceptionally.

External power input

• Supply voltage: 5 to 14 V DC standardly
• Minimum supply voltage: 4.8 V
• Maximum supply voltage: 14.5 V

Maximum supply current:

• For model W0841E: 100 mA
• For models W6810 and W8810: 300 mA

Power connector: Coaxial, 2.1 x 5.5 mm

Measurement and transmission of data

• Measuring interval: 1 minute (Temperature, Relative Humidity, Atmospheric Pressure); 10 minutes (CO2 concentration).
• Sending interval: Adjustable for 10 minutes, 20 minutes, 30 minutes, 1 hour, 3 hours, 6 hours, 12 hours, 24 hours.

RF part of device

• Working frequency: Transmission in the band 868.130 MHz; Reception in the band 869.525 MHz.
• Maximum transmission power: 25 mW (14 dBm).
• Antenna: Internal, gain 2 dBi.
• Minimum receiver sensitivity: -127 dBm @600bps, GFSK.
• Sigfox radiation class: 0U.
• Radio configuration zone: RC1.
• Typical range from base station: 50 km in open field, 3 km in urban area.

For correct operation, the device position must be maintained with the antenna vertically upward.

Operating and storage conditions

• Operating temperature: W0841E, W6810, W8810, W8861: -20 to +60 °C; W0841, W0846: -30 to +60 °C. Display visibility is within range -20 to +60 °C.
• Operating humidity: 0 to 95 %RH.
• Operating environment: Chemically non-aggressive.
• Working position: Vertically, the antenna top.
• Storage temperature: -20 to +45 °C.
• Storage humidity: 5 to 90 %RH.

Mechanical properties

• Dimensions (H x W x D): 179 x 134 x 45 mm (without cables and connectors).
• Weight including 1pc battery: W0841, W0841E, W6810: 350 g; W0846: 360 g; W8810, W8861: 340 g.
• Case material: ASA.
• Protection: W0841, W0846: IP65 (unused inputs must be sealed with the cap); W0841E, W6810, W8810: IP20; W8861: IP54, external probe CO2Rx IP65.

Transmitter Input Parameters

W0841

• Measured variable: 4 x temperature from the COMET Pt1000/E external probe.
• Range: -200 to +260 °C, sensor Pt1000/3850 ppm.
• Input accuracy (without probes): ±0.2 °C in range -200 to +100 °C; ±0.2 % of measured value in range +100 to +260 °C. Accuracy with attached probe is defined by input accuracy and probe accuracy.
• Connection method: Two-wire connection with compensation for resistance wire cable errors. Probe terminated by a 3-pin M8 ELKA 3008V connector. Recommended probe length up to 15 m, do not exceed 30 m.
• Response time: Determined by the response time of the used probe.
• Resolution: 0.1 °C.
• Recommended calibration interval: 2 years.

W0841E

• Measured variable: 4 x temperature from the COMET Pt1000/C external probe.
• Range: -200 to +260 °C, sensor Pt1000/3850 ppm.
• Input accuracy (without probes): ±0.2 °C in range -200 to +100 °C; ±0.2 % of measured value in range +100 to +260 °C. Accuracy with attached probe is defined by input accuracy and probe accuracy.
• Connection method: Two-wire connection with compensation for resistance wire cable errors. Probe terminated by a CINCH connector. Recommended probe length up to 15 m, do not exceed 30 m.
• Response time: Determined by the response time of the used probe.
• Resolution: 0.1 °C.
• Recommended calibration interval: 2 years.

W0846

• Measured variable: 3 x temperature from external thermocouple type K probe (NiCr-Ni) and ambient temperature.
• Range: Temperature Tc K: -200 to +1300 °C; Cold junction: Compensated in range -30 to +60 °C; Ambient temperature: -30 to +60 °C.
• Input accuracy (without probes): Temperature Tc K: ±(|0.3 % MV| + 1.5) °C; Ambient temperature: ±0.4 °C. Accuracy with attached probe is defined by input accuracy and probe accuracy.
• Probe connection method: Internal WAGO terminal block, max. conductor cross-section 2.5 m². Maximum probe length is 15 m; shielded cables recommended. Inputs for probes are not galvanically separated. Cable glands seal cables with diameter 2 to 5 mm.
• Response time (air flow approx. 1 m/s): Temperature Tc K: determined by probe response time; Ambient temperature: t90 < 40 min (T change 40 °C).
• Resolution: 0.1 °C.
• Recommended calibration interval: 2 years.

W6810

• Measured variables: Temperature and relative humidity from built-in sensor. Dew point temperature calculated from measured temperature and relative humidity.
• Range: Temperature: -20 to +60 °C; Relative humidity: 0 to 95 % RH (without permanent condensation); Dew point temperature: -60 to +60 °C; CO2 concentration in air: 0 to 5000 ppm.
• Accuracy: Temperature: ±0.4 °C; Relative humidity: sensor accuracy ±1.8 %RH (at 23 °C, 0-90 %RH), hysteresis < ±1 %RH, non-linearity < ±1 %RH, temperature error: 0.05 %RH/°C (0 to +60 °C); Dew point temperature: ±1.5 °C (at ambient T< 25 °C and RH > 30 %). CO2 concentration: 50 + 0.03 × MV ppm CO2 (at 23 °C and 1013 hPa); Temperature error: typical ±(1 + MV / 1000) ppm CO2/°C (-20 to +45 °C).
• Response time (air flow approx. 1 m/s): Temperature: t90 < 8 min (T change 20 °C); Relative humidity: t90 < 1 min (humidity change 30 %RH, constant temperature); CO2 concentration: t90 < 50 min (change 2500 ppm, constant temperature, without airflow).
• Resolution: Temperature/Dew point: 0.1 °C; Relative humidity: 0.1 %; CO2 concentration: 1 ppm.
• Recommended calibration interval: 1 year.

W8810

• Measured variables: Ambient temperature and CO2 concentration in air, both from the built-in sensor.
• Range: Temperature: -20 to +60 °C; CO2 concentration in air: 0 to 5000 ppm.
• Accuracy: Temperature: ±0.4 °C; CO2 concentration: 50 + 0.03 × MV ppm CO2 (at 23 °C and 1013 hPa); Temperature error: typical ±(1 + MV / 1000) ppm CO2/°C (-20 to +45 °C).
• Response time (air flow approx. 1 m/s): Temperature: t90 < 20 min (T change 20 °C); CO2 concentration: t90 < 50 min (change 2500 ppm, constant temperature, without airflow).
• Resolution: Temperature: 0.1 °C; CO2 concentration: 1 ppm.
• Recommended calibration interval: 2 years.

W8861

• Measured variables: Ambient temperature and atmospheric pressure from the built-in sensor. CO2 concentration in air measured by the external probe.
• Range: Temperature: -20 to +60 °C; Atmospheric pressure: 700 to 1100 hPa; CO2 concentration in air: 0 to 1 % (CO2R1-x probe) or 0 to 5 % (CO2R5-x probe).
• Accuracy: Temperature: ±0.4 °C; Atmospheric pressure: ±1.3 hPa at 23 °C; CO2 concentration (CO2R1-x probe): ±(0.01+0.05xMV) % CO2 (at 23 °C and 1013 hPa), temperature error: typical ±(0.0001 + 0.001xMV) % CO2/°C (-20 to +45 °C); CO2 concentration (CO2R5-x probe): ±(0.075+0.02xMV) % CO2 (at 23 °C and 1013 hPa), temperature error: typical -0.003xMV % CO2/°C (-20 to +45 °C).
• Response time (air flow approx. 1 m/s): Temperature: t90 < 20 min (T change 20 °C); CO2 concentration: t90 < 10 min (change 2500 ppm, constant temperature, without airflow).
• Resolution: Temperature: 0.1 °C; Atmospheric pressure: 0.1 hPa; CO2 concentration in air: 0.001 % CO2 (payload protocol/cloud), 0.01 % CO2 (device display).
• Recommended calibration interval: 2 years.

Dimensional drawings

Technical drawings showing the physical dimensions of each sensor model:

W0841

W0841E

W0846

W6810

W8810

W8861 and CO2R1-x (CO2R5-x) probe

Declaration of Conformity

The transmitter complies with the requirements of Directive 2014/35 / EU. The original Declaration of Conformity can be found at www.cometsystem.com.

Appendices

Appendix 1: Connecting the Pt1000/E probe connector

Appendix 2: Connecting the Pt1000/C probe Cinch connector

Appendix 3: Accuracy of dewpoint temperature measurement