Honeywell Sensor and Switch Solutions for HVAC

Honeywell offers a wide array of sensors and switches crucial for optimizing Heating, Ventilation, and Air Conditioning (HVAC) systems. These components are designed to enhance efficiency, improve air quality, and ensure the reliable operation of various HVAC applications.

HVAC Applications Overview

The following table details various Honeywell product lines applicable to HVAC systems, with asterisks (*) indicating focus products:

✓ Primary sensor/switch used within application (key design consideration for OEM)

✓ Secondary sensor/switch used within application (not a key design consideration)

Demand Control Ventilation

An efficient ventilation system responds to real-time data to optimize air recirculation, improving air quality and reducing HVAC running costs. Demand control ventilators support growing trends for environmentally friendly buildings with better indoor air quality.

• Differential Pressure Sensors: Measure differential pressure for static duct pressure and indoor air quality.
• CO2 Sensors: Adjust ventilation rates based on carbon dioxide levels, crucial for demand control and energy recovery ventilation.
• CO Sensors: Provide high-quality carbon monoxide detection in residential or commercial environments to help control indoor air quality.
• Power & Position Sensors: Enable efficient control of electric motors driving fans, blowers, and pumps.
• Temperature Sensors: Used in HVAC temperature controllers and for thermostat control.
• Basic Switches: Provide high-performance mechanical switching on direct-acting damper actuators.
• Limit Switches: Activate or deactivate elements or the entire ventilation system.

Air Purification & Filter Monitoring

Recent trends emphasize cleaner and healthier air, increasing the need for air purification and filter monitoring. Honeywell sensors support these applications by monitoring system performance and detecting issues.

• Differential Pressure Sensors: Monitor differential pressure for clogged filter detection, improving air quality and reducing power consumption.
• Airproving Switches: Used as airproving switching assemblies and for mechanical switching for valve position detection.
• Temperature Sensors: Utilized in HVAC temperature controllers and for thermostat control.
• Airflow Sensors: Monitor mass airflow for VAV controllers and in-line transmitters, balancing airflow in complex HVAC systems.
• Magnetic Sensor ICs: Provide motor and fan control, position sensing, and speed sensing for moving parts.

Air Conditioning

Air conditioning systems, whether centralized or standalone, require precise monitoring and control. Honeywell sensors help enhance system efficiency and reduce power consumption.

• Heavy-Duty Pressure Transducers: Monitor air conditioning compressor output and input pressure.
• Board Mount Pressure Sensors: Monitor differential pressure for clogged filter detection to improve air quality.
• Temperature Sensors: Used in HVAC temperature controllers and for thermostat control.
• Power & Position Sensors: Enable efficient control of electric motors driving fans, blowers, and pumps.

Heating System: Commercial

Commercial boilers rely on combustion to heat water and air, requiring energy efficiency and safety. Honeywell sensors contribute to efficiency and fault detection.

• Heavy-Duty Pressure Transducers: Monitor boiler water/steam output and input pressure for efficiency and power consumption reduction.
• Airflow Sensors: Monitor mass airflow for VAV controllers and in-line transmitters.
• Flow Sensors: Monitor the flow of warm air or water within the heating system for enhanced efficiency.
• Power & Position Sensors: Enable efficient control of electric motors driving fans, blowers, and pumps.
• CO Sensors: Measure CO levels, critical for safety during incomplete combustion.
• Gas Pilot Switches: Shut off gas flow if a pilot light goes out.
• Limit Switches: Activate or deactivate elements or the entire ventilation system.
• Pressure Switches: Monitor steam pressure for overpressure or low-pressure indication to prevent explosive situations.
• Float Switches: Act as air-proving switching assemblies or as float switches for indicating pipe flow backup.
• Limit Switches: Monitor damper or valve position, initiating program sequences when fully open.

Heating System: Residential

Residential heating systems need to be energy-efficient, reliable, and safe. Honeywell sensors improve efficiency and detect faults and leaks.

• Board Mount Pressure Sensors: Control the flow of warm air or water and detect leaks.
• CO Sensors: Detect incomplete combustion, as carbon monoxide is a hazardous gas.
• Temperature Sensors: Used in smart thermostats for efficient HVAC management and improved occupant comfort.
• Power & Position Sensors: Enable efficient control of electric motors driving fans, blowers, and pumps.
• Limit Switches: Activate or deactivate elements or the entire ventilation system.

Refrigeration

Refrigeration systems require durable sensors and switches with stable temperature and burst pressure capabilities. Honeywell products enhance system efficiency and safety.

• Heavy-Duty Pressure Transducers: Monitor refrigeration compressor output and input pressure.
• Basic Switches: Provide presence detection, on/off function, function monitoring, and end-of-travel in Zone 2 hazardous locations.
• Temperature Sensors: Used in temperature controllers and for compressor temperature monitoring.
• Power & Position Sensors: Enable efficient control of electric motors driving fans, blowers, and pumps.
• Limit Switches: Activate or deactivate elements or the entire system.
• Pressure Switches: Monitor overpressure or low-pressure indication to prevent potentially explosive situations.

Pressure Sensors and Transducers

Board Mount Pressure Sensors, Basic ABP/ABP2 Series

• Pressure range: 1 inH₂O to 175 psi
• High accuracy, Total Error Band (TEB): 1.5% Full Scale Span (FSS)
• Temperature compensated: -40°C to 110°C
• Temperature operating: -40°C to 110°C
• Extensive media compatibility
• Analog & digital (I²C/SPI) outputs
• Best for configurability & value

Board Mount Pressure Sensors, TruStability™ RSC, HSC and SSC Series

• Pressure range: 0.5 inH₂O to 150 psi
• High accuracy, TEB: 1.0% FSS
• Temperature compensated: -40°C to 85°C
• Temperature operating: -40°C to 85°C
• Outstanding EMI/EMC performance
• Analog & digital (I²C/SPI) outputs
• Best for accuracy, stability & performance

Heavy Duty Pressure Transducers, MIP Series

• Pressure range: 15 psi to 900 psi
• High accuracy, TEB: 0.75% FSS
• Temperature operating: -40°C to 125°C
• Compatible with a wide range of fluids and gases
• Rugged stainless steel 304L construction
• Outstanding EMI/EMC performance
• Best for accuracy, stability & performance

Hall-Effect and Magnetoresistive Sensor ICs

Linear Hall-Effect Sensor ICs, SS490 Series

• Small size with low power consumption
• Single current sinking or current sourcing linear output
• Built-in laser-trimmed thin-film resistors allow sensitivity and temperature compensation
• Responds to either positive or negative gauss
• Quad Hall sensing element for stable output

Magnetoresistive Sensor ICs

• Nanopower Series (SM351LT/SM353LT): SOT-23 package; Sensitivity of 7 G typ., 11 G max. (SM351LT/SM351RT/SM451R); 14 G typ., 20 G max. (SM353LT/SM353RT/SM453R); Omnipolar sensing activates with either pole from a magnet.
• Standard Power Series (SM351RT/SM451R/SM353RT/SM453R): Flat TO-92-style package; Sensitivity of 7 G typ., 11 G max. (SM351LT/SM351RT/SM451R); 14 G typ., 20 G max. (SM353LT/SM353RT/SM453R); Omnipolar sensing activates with either pole from a magnet.

High Sensitivity Latching Hall Sensors (SS360ST/NT/PT and SS460S for BLDC commutation)

• Fastest response time in its class
• No chopper stabilization
• High sensitivity; operates from only 30 gauss typ.
• Bipolar latching magnetics
• Can be supplied on tape-and-reel

Temperature Sensors

Thermistors, 192/194 Series

• High quality, low-cost, resistance temperature-matched interchangeable units
• Dissipation constant in still air: 0.75 mW/°C
• Time constant in air: 15.0 s
• Maximum diameter: 2.413 mm (0.095 in)
• Epoxy coated for resistance temperature curve, interchangeability, enhanced stability and life.

Gas Sensors

Carbon Dioxide Gas Sensor, CRIR-M1 Series

• Single channel, non-dispersive infrared (NDIR) sensor for detecting Carbon Dioxide
• Small size
• Maintenance-free for normal indoor applications
• Enhanced long-term stability
• Higher accuracy: ±40 ppm ±3% of reading
• Consistency and repeatability
• Auto baseline correction (ABC)

Carbon Monoxide Gas Sensor, ECOSURE X

• Cost-effective two-electrode electrochemical cell for detecting carbon monoxide in domestic/residential CO detection, industrial fire detection, and ventilation control.
• Unique design for use in extreme environments.
• Suitable for use in BS, EN, UL, LPC, VDS, and TÜV accredited products.
• Features an integrated active filter to eliminate false alarms caused by common household vapors.

Airflow Sensors

AWM3300 Series

• Small size
• Amplified signal conditioning
• 30 SCCM to 5 mBar
• Analog output
• 50 mW typ. power consumption
• -25°C to 85°C (-13°F to 185°F) operating range

MICRO SWITCH Basic Switches

MICRO SWITCH Large Basic Switches, IBZ and WA Series; DT Series

• Accepted world-wide standard "Large Basic" switch
• Low operating force and differential travel
• Long mechanical life up to 20,000,000 cycles at 95% survival
• Current rating ranges from 15 A to 25 A
• Choice of actuation, termination, and operating characteristics
• Two independent single-pole double-throw circuits in one housing and actuator (DT)

MICRO SWITCH V-Basic Miniature Switches, V19 Series

• RoHS/REACH/Cal Prop65 compliant
• UL/CSA, cUL, ENEC, CQC certifications enable global design acceptance and cost savings in agency approvals
• 5 A, 16 A: electrical ratings for design flexibility in one industry-standard package
• >1M mechanical operations

MICRO SWITCH V-Basic Miniature Switches, V15 Series

• Designed for 10K to 50K operations at a full load or 5M for mechanical life
• World-wide package size acceptance
• Current rating ranges of 10 A and 26 A
• UL/CSA, cUL, UKCA, ENEC, and CQC approvals

MICRO SWITCH Explosion-Proof Basic Switches, V15W2 Series

• Approved for use in Zone 2 hazardous locations
• IP67 equivalent
• UL, cUL, UKCA, ENEC, CQC, ATEX, IEC Ex approvals
• 5 A electrical rating
• Longer service life: over one million mechanical operations

MICRO SWITCH Subminiature Switches, ZM/ZW/ZX Series

• Best suited for lower cost-of-failure applications
• Small, lightweight, low cost, enhanced life, ample electrical capability
• Choice of low energy or power-duty electrical ratings (gold-plated or silver contacts)
• Choice of ratings, actuation, termination, and operating characteristics
• UL/CSA, cUL, ENEC, and CE approvals

MICRO SWITCH Toggle Switches

MICRO SWITCH Toggle Switches, NT Series

• ISA 12.12.01 certified; designed for use near flammable hydrocarbon refrigerants
• Quick-connect spade terminals
• UL191 electrical rating
• Sealed to NEMA 3, 3R, 4, 13, and IP67
• Operating temperature range: -40°C to 71°C (-40°F to 160°F)

MICRO SWITCH Pushbutton Switches

Operator Interface Switches and Indicators, AML Series

• Pushbuttons, paddles, rockers, key-actuated, and indicators within AML Series for coordinated panel appearance
• Less than 1.75 inch panel depth
• Two or three positions and maintained or momentary action
• One-, two-, or four-poles with double throw available for most switches

Pressure Switches

Extended Duty Pressure Switches, 5000 Series

• Specifically designed to withstand extended duty applications
• Factory set but capable of field adjustment
• Direct action blade contact
• Burst pressure: 750 psi for 0.5 psi to 24 psi set point range; 1250 psi for 25 psi to 150 psi set point range

Warranty/Remedy

Honeywell warrants its manufactured goods to be free from defective materials and faulty workmanship. Honeywell's standard product warranty applies unless otherwise agreed in writing. For specific warranty details, please refer to your order acknowledgment or consult your local sales office. If warranted goods are returned to Honeywell during the coverage period, Honeywell will repair or replace, at its option, without charge, those items that Honeywell, in its sole discretion, finds defective. The foregoing is the buyer's sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. Honeywell shall not be liable for consequential, special, or indirect damages.

While Honeywell may provide information or engineering support through its personnel, literature, and website, it is the buyer's sole responsibility to determine the suitability of Honeywell product(s) for the buyer's requirements. Specifications are subject to change without notice. The information supplied is believed to be accurate and reliable at the time of writing, but Honeywell assumes no responsibility for its use.

FOR MORE INFORMATION

Honeywell Sensing Solutions serves its customers through a worldwide network of sales offices and distributors. For application assistance, current specifications, pricing, or the nearest Authorized Distributor, visit automation.honeywell.com/hss or call: