Collection: Indoor Air Quality (IAQ) and Combo Sensors

Indoor Air Quality (IAQ) affects health and productivity, with pollutants like mold and VOCs causing issues, while good ventilation improves well-being, and sensors help manage these conditions by signaling systems to adjust for cleaner air, reducing headaches and fatigue. Combo Sensors measure room levels of varying conditions. Many models include temperature and relative humidity, while others incorporate these with air quality sensors for gases (CO2, CO, NO2) and/or particulate matter.

Greystone NTRCLRHP (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Setpoint Adjustment, 2 button up/down

Greystone NTRCLRHP (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Setpoint Adjustment, 2 button up/down

Regular price $231.76 USD

Regular price Sale price $231.76 USD
Greystone NTRCLRHFS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Momentary Override Switch - N.O.

Greystone NTRCLRHFS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Momentary Override Switch - N.O.

Regular price $244.81 USD

Regular price Sale price $244.81 USD
Greystone NTRCLRHFRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Relay Output, Momentary Override Switch - N.O.

Greystone NTRCLRHFRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Relay Output, Momentary Override Switch - N.O.

Regular price $260.44 USD

Regular price Sale price $260.44 USD
Greystone NTRCLRHFR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Relay Output

Greystone NTRCLRHFR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Relay Output

Regular price $255.23 USD

Regular price Sale price $255.23 USD
Greystone NTRCLRHFPS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Momentary Override Switch - N.O.

Greystone NTRCLRHFPS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Momentary Override Switch - N.O.

Regular price $250.04 USD

Regular price Sale price $250.04 USD
Greystone NTRCLRHFPRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Relay Output, Momentary Override Switch - N.O.

Greystone NTRCLRHFPRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Relay Output, Momentary Override Switch - N.O.

Regular price $265.70 USD

Regular price Sale price $265.70 USD
Greystone NTRCLRHFPR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Relay Output

Greystone NTRCLRHFPR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Relay Output

Regular price $260.44 USD

Regular price Sale price $260.44 USD
Greystone NTRCLRHFP (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down

Greystone NTRCLRHFP (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down

Regular price $244.81 USD

Regular price Sale price $244.81 USD
Greystone NTRCLRHF (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position

Greystone NTRCLRHF (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Fanspeed Switch, 5 Position

Regular price $239.61 USD

Regular price Sale price $239.61 USD
Greystone NTRCLRHDS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Momentary Override Switch - N.O.

Greystone NTRCLRHDS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Momentary Override Switch - N.O.

Regular price $247.42 USD

Regular price Sale price $247.42 USD
Greystone NTRCLRHDRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Relay Output, Momentary Override Switch - N.O.

Greystone NTRCLRHDRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Relay Output, Momentary Override Switch - N.O.

Regular price $263.05 USD

Regular price Sale price $263.05 USD
Greystone NTRCLRHDR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Relay Output

Greystone NTRCLRHDR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Relay Output

Regular price $257.85 USD

Regular price Sale price $257.85 USD
Greystone NTRCLRHDPS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Setpoint Adjustment, 2 button up/down, Momentary Override Switch - N.O.

Greystone NTRCLRHDPS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Setpoint Adjustment, 2 button up/down, Momentary Override Switch - N.O.

Regular price $252.62 USD

Regular price Sale price $252.62 USD
Greystone NTRCLRHDPRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Setpoint Adjustment, 2 button up/down, Relay Output, Momentary Override Switch - N.O.

Greystone NTRCLRHDPRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Setpoint Adjustment, 2 button up/down, Relay Output, Momentary Override Switch - N.O.

Regular price $268.29 USD

Regular price Sale price $268.29 USD
Greystone NTRCLRHDPR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Setpoint Adjustment, 2 button up/down, Relay Output

Greystone NTRCLRHDPR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Setpoint Adjustment, 2 button up/down, Relay Output

Regular price $263.05 USD

Regular price Sale price $263.05 USD
Greystone NTRCLRHDP (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Setpoint Adjustment, 2 button up/down

Greystone NTRCLRHDP (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Setpoint Adjustment, 2 button up/down

Regular price $247.42 USD

Regular price Sale price $247.42 USD
Greystone NTRCLRHDFS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Momentary Override Switch - N.O.

Greystone NTRCLRHDFS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Momentary Override Switch - N.O.

Regular price $260.44 USD

Regular price Sale price $260.44 USD
Greystone NTRCLRHDFRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Relay Output, Momentary Override Switch - N.O.

Greystone NTRCLRHDFRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Relay Output, Momentary Override Switch - N.O.

Regular price $276.10 USD

Regular price Sale price $276.10 USD
Greystone NTRCLRHDFR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Relay Output

Greystone NTRCLRHDFR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Relay Output

Regular price $270.87 USD

Regular price Sale price $270.87 USD
Greystone NTRCLRHDFPS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Momentary Override Switch - N.O.

Greystone NTRCLRHDFPS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Momentary Override Switch - N.O.

Regular price $265.70 USD

Regular price Sale price $265.70 USD
Greystone NTRCLRHDFPRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Relay Output, Momentary Override Switch - N.O.

Greystone NTRCLRHDFPRS (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Relay Output, Momentary Override Switch - N.O.

Regular price $281.30 USD

Regular price Sale price $281.30 USD
Greystone NTRCLRHDFPR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Relay Output

Greystone NTRCLRHDFPR (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down, Relay Output

Regular price $276.10 USD

Regular price Sale price $276.10 USD
Greystone NTRCLRHDFP (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down

Greystone NTRCLRHDFP (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position, Setpoint Adjustment, 2 button up/down

Regular price $260.44 USD

Regular price Sale price $260.44 USD
Greystone NTRCLRHDF (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position

Greystone NTRCLRHDF (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input, Fanspeed Switch, 5 Position

Regular price $255.23 USD

Regular price Sale price $255.23 USD
Greystone NTRCLRHD (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input

Greystone NTRCLRHD (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity, Digital Input

Regular price $242.19 USD

Regular price Sale price $242.19 USD
Greystone NTRCLRH (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity

Greystone NTRCLRH (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Viewable, Temperature & Humidity

Regular price $226.57 USD

Regular price Sale price $226.57 USD
Greystone NTRCNT (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Concealed, Temperature Only

Greystone NTRCNT (NTRC Series) Network Sensor w/ BACnet or Modbus Communications, Concealed, Temperature Only

Regular price $130.22 USD

Regular price Sale price $130.22 USD
Greystone CERMC59 Room Carbon Dioxide Sensor, 0-2000 ppm, 10,000 Ohm NTC Thermistor, ±0.2 C

Greystone CERMC59 Room Carbon Dioxide Sensor, 0-2000 ppm, 10,000 Ohm NTC Thermistor, ±0.2 C

Regular price $204.80 USD

Regular price Sale price $204.80 USD
Greystone CERMC24 Room Carbon Dioxide Sensor, 0-2000 ppm, 10,000 Ohm, type 2, NTC Thermistor, ±0.2 CType 59 - 10,000 ohm NTC Thermistor ±0.2°C

Greystone CERMC24 Room Carbon Dioxide Sensor, 0-2000 ppm, 10,000 Ohm, type 2, NTC Thermistor, ±0.2 CType 59 - 10,000 ohm NTC Thermistor ±0.2°C

Regular price $200.51 USD

Regular price Sale price $200.51 USD
Greystone CERMC20 Room Carbon Dioxide Sensor, 0-2000 ppm, 20,000 Ohm, NTC Thermistor, ±0.2 CType 24 - 10,000 ohm Type 2 NTC Thermistor ±0.2°C

Greystone CERMC20 Room Carbon Dioxide Sensor, 0-2000 ppm, 20,000 Ohm, NTC Thermistor, ±0.2 CType 24 - 10,000 ohm Type 2 NTC Thermistor ±0.2°C

Regular price $200.51 USD

Regular price Sale price $200.51 USD
Greystone CERMC14 Room Carbon Dioxide Sensor, 0-2000 ppm, 10,000 Ohm, type 3, NTC Thermistor, ±0.2 C c/w 11K shunt resistorType 20 - 20,000 ohm NTC Thermistor ±0.2°C

Greystone CERMC14 Room Carbon Dioxide Sensor, 0-2000 ppm, 10,000 Ohm, type 3, NTC Thermistor, ±0.2 C c/w 11K shunt resistorType 20 - 20,000 ohm NTC Thermistor ±0.2°C

Regular price $204.80 USD

Regular price Sale price $204.80 USD
Greystone CERMC13 Room Carbon Dioxide Sensor, 0-2000 ppm, 1000 Ohm Nickel, Class B, DIN 43760Type 14 - 10,000 ohm Thermistor ±0.2°C c/w 11K Shunt Resistor

Greystone CERMC13 Room Carbon Dioxide Sensor, 0-2000 ppm, 1000 Ohm Nickel, Class B, DIN 43760Type 14 - 10,000 ohm Thermistor ±0.2°C c/w 11K Shunt Resistor

Regular price $204.80 USD

Regular price Sale price $204.80 USD
Greystone CERMC12 Room Carbon Dioxide Sensor, 0-2000 ppm, 1000 Ohm Platinum, IEC 751, 385 Alpha, thin filmType 13 - 1000 ohm Nickel RTD ±0.3°C

Greystone CERMC12 Room Carbon Dioxide Sensor, 0-2000 ppm, 1000 Ohm Platinum, IEC 751, 385 Alpha, thin filmType 13 - 1000 ohm Nickel RTD ±0.3°C

Regular price $204.80 USD

Regular price Sale price $204.80 USD
Greystone CERMC08 Room Carbon Dioxide Sensor, 0-2000 ppm, 2.252K Ohm, NTC Thermistor, ±0.2 CType 12 - Pt1000 - 1000 ohm Platinum RTD ±0.3°C

Greystone CERMC08 Room Carbon Dioxide Sensor, 0-2000 ppm, 2.252K Ohm, NTC Thermistor, ±0.2 CType 12 - Pt1000 - 1000 ohm Platinum RTD ±0.3°C

Regular price $204.80 USD

Regular price Sale price $204.80 USD
Greystone CERMC07 Room Carbon Dioxide Sensor, 0-2000 ppm, 10,000 Ohm, type 3, NTC Thermistor, ±0.2 CType 8 - 2.252K ohm NTC Thermistor ±0.2°C

Greystone CERMC07 Room Carbon Dioxide Sensor, 0-2000 ppm, 10,000 Ohm, type 3, NTC Thermistor, ±0.2 CType 8 - 2.252K ohm NTC Thermistor ±0.2°C

Regular price $200.51 USD

Regular price Sale price $200.51 USD
Greystone CERMC06 Room Carbon Dioxide Sensor, 0-2000 ppm, 3000 Ohm, NTC Thermistor, ±0.2 CType 7 - 10,000 ohm Type 3 NTC Thermistor ±0.2°C

Greystone CERMC06 Room Carbon Dioxide Sensor, 0-2000 ppm, 3000 Ohm, NTC Thermistor, ±0.2 CType 7 - 10,000 ohm Type 3 NTC Thermistor ±0.2°C

Regular price $200.51 USD

Regular price Sale price $200.51 USD
Greystone CERMC05 Room Carbon Dioxide Sensor, 0-2000 ppm, 1801 Ohm, NTC Thermistor, ±0.2 CType 6 - 3000 ohm NTC Thermistor ±0.2°C

Greystone CERMC05 Room Carbon Dioxide Sensor, 0-2000 ppm, 1801 Ohm, NTC Thermistor, ±0.2 CType 6 - 3000 ohm NTC Thermistor ±0.2°C

Regular price $200.51 USD

Regular price Sale price $200.51 USD
Greystone CERMC02 Room Carbon Dioxide Sensor, 0-2000 ppm, 100 Ohm Plat. IEC 751, 385 Alpha, thin filmType 5 - 1800 ohm NTC Thermistor ±0.2°C

Greystone CERMC02 Room Carbon Dioxide Sensor, 0-2000 ppm, 100 Ohm Plat. IEC 751, 385 Alpha, thin filmType 5 - 1800 ohm NTC Thermistor ±0.2°C

Regular price $204.80 USD

Regular price Sale price $204.80 USD
Greystone CERMC00 Room Carbon Dioxide Sensor, 0-2000 ppm, No temperature sensorType 2 - Pt100 - 100 ohm Platinum RTD ±0.3°C

Greystone CERMC00 Room Carbon Dioxide Sensor, 0-2000 ppm, No temperature sensorType 2 - Pt100 - 100 ohm Platinum RTD ±0.3°C

Regular price $192.12 USD

Regular price Sale price $192.12 USD
Greystone HTRC5NVS Room Humidity/ Temperature Transmitter, 5%, Concealed LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable, Override switch (Includes OCC input)

Greystone HTRC5NVS Room Humidity/ Temperature Transmitter, 5%, Concealed LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable, Override switch (Includes OCC input)

Regular price $188.80 USD

Regular price Sale price $188.80 USD
Greystone HTRC5NV Room Humidity/ Temperature Transmitter, 5%, Concealed LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable

Greystone HTRC5NV Room Humidity/ Temperature Transmitter, 5%, Concealed LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable

Regular price $183.57 USD

Regular price Sale price $183.57 USD
Greystone HTRC5NIS Room Humidity/ Temperature Transmitter, 5%, Concealed LCD, 4-20 mA output, Override switch (Includes OCC input)

Greystone HTRC5NIS Room Humidity/ Temperature Transmitter, 5%, Concealed LCD, 4-20 mA output, Override switch (Includes OCC input)

Regular price $188.80 USD

Regular price Sale price $188.80 USD
Greystone HTRC5NI Room Humidity/ Temperature Transmitter, 5%, Concealed LCD, 4-20 mA output

Greystone HTRC5NI Room Humidity/ Temperature Transmitter, 5%, Concealed LCD, 4-20 mA output

Regular price $183.57 USD

Regular price Sale price $183.57 USD
Greystone HTRC5LVS Room Humidity/ Temperature Transmitter, 5%, Viewable LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable, Override switch (Includes OCC input)

Greystone HTRC5LVS Room Humidity/ Temperature Transmitter, 5%, Viewable LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable, Override switch (Includes OCC input)

Regular price $215.04 USD

Regular price Sale price $215.04 USD
Greystone HTRC5LV Room Humidity/ Temperature Transmitter, 5%, Viewable LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable

Greystone HTRC5LV Room Humidity/ Temperature Transmitter, 5%, Viewable LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable

Regular price $209.81 USD

Regular price Sale price $209.81 USD
Greystone HTRC5LIS Room Humidity/ Temperature Transmitter, 5%, Viewable LCD, 4-20 mA output, Override switch (Includes OCC input)

Greystone HTRC5LIS Room Humidity/ Temperature Transmitter, 5%, Viewable LCD, 4-20 mA output, Override switch (Includes OCC input)

Regular price $215.04 USD

Regular price Sale price $215.04 USD
Greystone HTRC5LI Room Humidity/ Temperature Transmitter, 5%, Viewable LCD, 4-20 mA output

Greystone HTRC5LI Room Humidity/ Temperature Transmitter, 5%, Viewable LCD, 4-20 mA output

Regular price $209.81 USD

Regular price Sale price $209.81 USD
Greystone HTRC3NVS Room Humidity/ Temperature Transmitter, 3%, Concealed LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable, Override switch (Includes OCC input)

Greystone HTRC3NVS Room Humidity/ Temperature Transmitter, 3%, Concealed LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable, Override switch (Includes OCC input)

Regular price $241.28 USD

Regular price Sale price $241.28 USD
Greystone HTRC3NV Room Humidity/ Temperature Transmitter, 3%, Concealed LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable

Greystone HTRC3NV Room Humidity/ Temperature Transmitter, 3%, Concealed LCD, 0-5 Vdc or 0-10 Vdc output - Jumper selectable

Regular price $236.04 USD

Regular price Sale price $236.04 USD
Greystone HTRC3NIS Room Humidity/ Temperature Transmitter, 3%, Concealed LCD, 4-20 mA output, Override switch (Includes OCC input)

Greystone HTRC3NIS Room Humidity/ Temperature Transmitter, 3%, Concealed LCD, 4-20 mA output, Override switch (Includes OCC input)

Regular price $241.28 USD

Regular price Sale price $241.28 USD

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Collection: Indoor Air Quality (IAQ) and Combo Sensors

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