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Wireless Plus Sensor
WS2-TO-C-902

As part of Carrier’s wireless sensing line, wireless plus sensors are used to measure temperature & humidity in a space. Because there are no wires to run, they can be added to your building easily.

Wireless sensors work in conjunction with a wireless adapter, which enables wireless communication between the sensors and an i-Vu® BACnet controller in the space. By sensing temperature, humidity and occupancy wirelessly, our i-Vu controllers can make smart decisions to optimize the control of heating, cooling, and lighting systems in the building, providing optimum occupant comfort and energy efficiency.


  • Easy to install
  • Communicates on the Rnet sensor network via a wireless adapter
  • Can be installed up to 60’ away from wireless sensors
  • Enables wireless sensing on new or retrofit projects
  • Wireless software included for quick and easy sensor pairing
  • Includes dial for adjusting heat/cool setpoints
  • Available in two models: temperature only (WS2-TO-C-902), and temperature & relative humidity (WS2-THO-C-902)
  • Wireless and battery-less space sensors (assuming sufficient lighting exists in space)
  • Maintenance-free capacitors power the sensors during unlit periods for up to 5 days without a light source
  • No repeaters or amplifiers required for zone-based applications
  • Integrates seamlessly with i-Vu® system alarming for proactive monitoring of important sensor conditions, including:
    • Sensor charge level
    • Sensor strength signal
    • Sensor offline
  • Can co-exist on Rnet with Carrier’s wired ZS sensors
  • Single-zone controllers can support a total of 5 sensors
  • Multi-zone controllers can support up to 15 sensors
Power supply Solar harvesting, internal energy storage
Supplemental battery A 1/2 AA 3.6 V 1200 mA battery is included to supplement power during commissioning and for low-light conditions
Maximum operating life Up to 5 days with no light power or battery
Time to fully charge Depends on available lux. Full charge in 8 hours @ 1000 lux or 24 hours @333 lux
Temperature sensor measuring range 32° to 104°F (0° to 40°C)
Humidity sensor 11% to 89%, ±3% RH typical
Motion sensor Panasonic AMN42122 - Effective detection range: 16.4 ft. (5 m) maximum
Protocol Customized version of EnOcean®
Radio frequency 902 MHz (North America)
Transmission range Typically, 75-80 ft. (18.29 m) maximum from wireless adapter, assuming sensor and wireless adapter are separated by no more than 1 drop ceiling or 2 walls (drywall with metal studs)
Transmission interval Configurable in SensorBuilder. The sensor transmits:
• On change of sensed value, and
• At a regular interval (heartbeat). The default is every 15 minutes
Change of value threshold Configurable in SensorBuilder. The temperature must change by at least .288°F (.156°C) (the default) for the sensor to send a change of value
Minimum illumination strength 150 lux, constant
Degree of protection IP50
Operating environment 32° to 122°F (0° to 50°C) 5% to 95% relative humidity (non-condensing)
Housing ABS plastic, traffic white color
Weight 0.20 lb. (.08 kg)
Dimensions 3.555 in. W x 3.768 in. H x 0.840 in. D (9.030 cm W x 9.570 cm H x 2.134 cm D)
Compliance United States of America
FCC CFR 47, Chapter 1, Subchapter A, Part 15, Subpart B
Class B Contains FCC ID: SZV-STM300U
UL-916 (PAZX) Energy Management Equipment

Canada
Industry Canada Compliant, ICES-003, Class B
cUL Listed UL-916, PAZX7, Energy Management Equipment

Europe
EN50491-5-2:2009; Part 5-2: EMC requirements for HBES/BACS used in residential, commercial and light industry environment
EN50491-3:2009 Part 3: Electrical safety requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS)
Low Voltage Directive: 200695/EC RoHS Compliant: 2011/65/EU

Australia and New Zealand
C-Tick Mark AS/NZS 61000-6-3
  • Easy to install
  • Communicates on the Rnet sensor network via a wireless adapter
  • Can be installed up to 60’ away from wireless sensors
  • Enables wireless sensing on new or retrofit projects
  • Wireless software included for quick and easy sensor pairing
  • Includes dial for adjusting heat/cool setpoints
  • Available in two models: temperature only (WS2-TO-C-902), and temperature & relative humidity (WS2-THO-C-902)
  • Wireless and battery-less space sensors (assuming sufficient lighting exists in space)
  • Maintenance-free capacitors power the sensors during unlit periods for up to 5 days without a light source
  • No repeaters or amplifiers required for zone-based applications
  • Integrates seamlessly with i-Vu® system alarming for proactive monitoring of important sensor conditions, including:
    • Sensor charge level
    • Sensor strength signal
    • Sensor offline
  • Can co-exist on Rnet with Carrier’s wired ZS sensors
  • Single-zone controllers can support a total of 5 sensors
  • Multi-zone controllers can support up to 15 sensors
Power supply Solar harvesting, internal energy storage
Supplemental battery A 1/2 AA 3.6 V 1200 mA battery is included to supplement power during commissioning and for low-light conditions
Maximum operating life Up to 5 days with no light power or battery
Time to fully charge Depends on available lux. Full charge in 8 hours @ 1000 lux or 24 hours @333 lux
Temperature sensor measuring range 32° to 104°F (0° to 40°C)
Humidity sensor 11% to 89%, ±3% RH typical
Motion sensor Panasonic AMN42122 - Effective detection range: 16.4 ft. (5 m) maximum
Protocol Customized version of EnOcean®
Radio frequency 902 MHz (North America)
Transmission range Typically, 75-80 ft. (18.29 m) maximum from wireless adapter, assuming sensor and wireless adapter are separated by no more than 1 drop ceiling or 2 walls (drywall with metal studs)
Transmission interval Configurable in SensorBuilder. The sensor transmits:
• On change of sensed value, and
• At a regular interval (heartbeat). The default is every 15 minutes
Change of value threshold Configurable in SensorBuilder. The temperature must change by at least .288°F (.156°C) (the default) for the sensor to send a change of value
Minimum illumination strength 150 lux, constant
Degree of protection IP50
Operating environment 32° to 122°F (0° to 50°C) 5% to 95% relative humidity (non-condensing)
Housing ABS plastic, traffic white color
Weight 0.20 lb. (.08 kg)
Dimensions 3.555 in. W x 3.768 in. H x 0.840 in. D (9.030 cm W x 9.570 cm H x 2.134 cm D)
Compliance United States of America
FCC CFR 47, Chapter 1, Subchapter A, Part 15, Subpart B
Class B Contains FCC ID: SZV-STM300U
UL-916 (PAZX) Energy Management Equipment

Canada
Industry Canada Compliant, ICES-003, Class B
cUL Listed UL-916, PAZX7, Energy Management Equipment

Europe
EN50491-5-2:2009; Part 5-2: EMC requirements for HBES/BACS used in residential, commercial and light industry environment
EN50491-3:2009 Part 3: Electrical safety requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS)
Low Voltage Directive: 200695/EC RoHS Compliant: 2011/65/EU

Australia and New Zealand
C-Tick Mark AS/NZS 61000-6-3

California residents please see Proposition 65