SR65 rH 902 MHz

Datasheet

Subject to technical alteration

Issue date: 24/07/2025

Application

Description of use: Wireless sensor for detection of temperature and rel. humidity in outdoor areas, cold stores, greenhouses, production plants, and warehouses. Features self-powered EnOcean wireless technology. Configuration via airConfig. Intended for use in automation solutions for functional buildings. Transmits sensor data unencrypted over short distances. Does not communicate directly with the Internet. Automation stations forwarding data via the Internet must ensure encryption.

Security Advice – CAUTION

⚠️ The installation and assembly of the device should only be performed by authorized personnel.

The product should only be used for its intended application. Unauthorized modifications are prohibited. Do not use with equipment that could threaten human health or life in case of failure. Ensure all power is disconnected before installing. Do not connect to live/operating equipment.

Compliance:

• Local laws, health & safety regulations, technical standards and regulations
• Condition of the device at the time of installation for safe installation
• This data sheet and installation manual

Notes on Disposal

?️ The crossed-out wheelie bin symbol indicates that the product or removable batteries must not be disposed of with household or commercial waste. Within the EU, disposal must be separate and appropriate according to national laws. Contact your supplier or Thermokon Sensortechnik GmbH for assistance. Further information is available at: www.thermokon.com

Guidelines for Devices with Solar Energy Storage

The "EasySens" wireless sensors utilize energy-optimized EnOcean radio technology, allowing them to work without batteries and self-charge via integrated solar cells, making them maintenance-free and environmentally friendly.

For optimal use, mount the device in a location with sufficient ambient brightness (minimum 200 lx for at least 3-4 hours daily). The solar cell should face towards a window if possible. Avoid direct sun radiation if the device has a temperature sensor to prevent false readings.

Ensure the mounting position is not obstructed by future placement areas, furniture, or cupboards.

If stored in darkness, the internal solar energy storage may need recharging, which typically occurs automatically during commissioning or initial startup in ambient light. Full operating state may take 3-4 days with sufficient illumination. Battery backup options are available for darker rooms (<100 lx).

Battery operating time depends on transmission frequency, component aging, and self-discharge. Standard operating time with batteries is several years. Switching to battery operation is automatic when a battery is added.

Application Notice for Humidity Sensors

Refrain from touching the sensitive humidity sensor/element; doing so will void the warranty.

Re-calibration is recommended annually for standard environmental conditions to maintain accuracy.

Exposure to high ambient temperature, humidity, or aggressive gases (chlorine, ozone, ammonia) may affect the sensor element, potentially requiring earlier re-calibration. Re-calibration and sensor deterioration due to environmental conditions are not covered by the general warranty.

Product Testing and Certification

CE

Declaration of conformity: Available on the website https://www.thermokon.de/direct/en-gb/categories/sr65

Information about EasySens® (Radio) / airConfig General Usage

[airConfig] [EnOcean]

Basic information about EasySens® radio and airConfig software usage can be downloaded from: https://www.thermokon.de/direct/files/information-radio-airconfig-en.pdf

Overview of Radio Telegrams

[PDF] EEP: The structure of data in the telegram can be found in the EEP (EnOcean equipment profile) list provided by the EnOcean Alliance: http://tools.enocean-alliance.org/EEPViewer/

Overview of airConfig Selectable Radio Telegrams

• A5-04-02 (default)
• A5-04-01
• A5-04-03

Technical Data

Configuration with airConfig

airConfig is not needed if default settings are used. airConfig and an EnOcean USB transceiver (e.g., USB300C) are mandatory for changing default EEP and other settings.

Device Information: Provides information regarding the Energy status of the device. Energy status must be OK or a battery must be inserted to configure the device.

EEP Selection: Click the drop-down menu to choose the desired measuring range. Byte values for temperature are shown below. Attention: Only operate the sensor within the specified measuring range.

Change of value: Defines the minimal temperature change required since the last transmission to send a new telegram.

Temperature/Humidity Offset: Set for individual adjustment.

Wake-up time: Defines the measuring interval.

Heartbeat cycle: Defines the maximum number of wake-ups without transmitting temperature between transmissions. Receivers monitor this interval to detect missing sensor signals.

Configuration Process

To send new settings: Right-click the device icon and select "send configuration". The sensor, which is in sleep mode, needs to be woken up by pressing the LRN button.

Successful transfer is indicated by the sensor highlighting in green. Red highlighting indicates a transmission problem.

Note: Frequent wake-ups, measurements, and data transmissions consume more energy, potentially leading to insufficient energy charge from ambient illumination.

Mounting Advice

When mounting outdoors, protect the device against direct sun or rain. Use a protective cover if necessary.

Incorrect Mounting Examples: ❌ Device exposed to direct sun. ❌ Device exposed to rain. ❌ Device obstructed.

Correct Mounting Example: ✔️ Device mounted in a protected, well-lit location.

Dimensions (MM)

Diagram Description: A diagram shows the sensor unit with dimensions. The main body is approximately 50mm x 38mm. A mounting bracket extends from the base. The overall width is approximately 65mm. Height is approximately 45.5mm, with a depth of 59mm at the sensor element housing.

Optional Accessories

• Battery LS14250 (Item No. 315098)
• Rain protection PA6, white (Item No. 587709)
• Filter stainless steel, wire mesh (spare part) (Item No. 231169)
• Raw plugs and screws (2 pcs. each) (Item No. 102209)