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 CDD4B100T14S Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, 10K ohm Thermistor+11K shunt resistor and override switch

Greystone CDD4B100T14S Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, 10K ohm Thermistor+11K shunt resistor and override switch

Regular price $513.63 USD

Regular price Sale price $513.63 USD
Greystone CDD4B100T14R Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, 10K ohm Thermistor+11K shunt resistor and relay

Greystone CDD4B100T14R Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, 10K ohm Thermistor+11K shunt resistor and relay

Regular price $523.78 USD

Regular price Sale price $523.78 USD
Greystone CDD4B100T14 Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display and 10K ohm Thermistor+11K shunt resistor

Greystone CDD4B100T14 Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display and 10K ohm Thermistor+11K shunt resistor

Regular price $508.55 USD

Regular price Sale price $508.55 USD
Greystone CDD4B100T13S Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, PT1000 Nickel RTD and override switch

Greystone CDD4B100T13S Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, PT1000 Nickel RTD and override switch

Regular price $513.63 USD

Regular price Sale price $513.63 USD
Greystone CDD4B100T13R Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, PT1000 Nickel RTD and relay

Greystone CDD4B100T13R Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, PT1000 Nickel RTD and relay

Regular price $523.78 USD

Regular price Sale price $523.78 USD
Greystone CDD4B100T13 Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display and PT1000 Nickel RTD

Greystone CDD4B100T13 Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display and PT1000 Nickel RTD

Regular price $508.55 USD

Regular price Sale price $508.55 USD
Greystone CDD4B100T12S Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, PT1000 ohm RTD and override switch

Greystone CDD4B100T12S Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, PT1000 ohm RTD and override switch

Regular price $515.41 USD

Regular price Sale price $515.41 USD
Greystone CDD4B100T12R Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, PT1000 ohm RTD and relay

Greystone CDD4B100T12R Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display, PT1000 ohm RTD and relay

Regular price $525.60 USD

Regular price Sale price $525.60 USD
Greystone CDD4B100T12 Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display and PT1000 ohm RTD

Greystone CDD4B100T12 Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display and PT1000 ohm RTD

Regular price $510.30 USD

Regular price Sale price $510.30 USD
Greystone CDD4B100R Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display and relay

Greystone CDD4B100R Room, CO2, NDIR dual beam, c/w analog outputs, concealed LCD display and relay

Regular price $512.97 USD

Regular price Sale price $512.97 USD
Greystone CDD4B100 Room, CO2, NDIR dual beam, c/w analog outputs, and concealed LCD display

Greystone CDD4B100 Room, CO2, NDIR dual beam, c/w analog outputs, and concealed LCD display

Regular price $497.63 USD

Regular price Sale price $497.63 USD
Greystone CDD5B101S Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Exposed push button momentary switch - N.O.

Greystone CDD5B101S Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Exposed push button momentary switch - N.O.

Regular price $426.19 USD

Regular price Sale price $426.19 USD
Greystone CDD5B101R Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Relay Output

Greystone CDD5B101R Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Relay Output

Regular price $436.38 USD

Regular price Sale price $436.38 USD
Greystone CDD5B101PS Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Linear slide pot for set point control, Exposed push button momentary switch - N.O.

Greystone CDD5B101PS Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Linear slide pot for set point control, Exposed push button momentary switch - N.O.

Regular price $431.33 USD

Regular price Sale price $431.33 USD
Greystone CDD5B101PR Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Linear slide pot for set point control, Relay Output

Greystone CDD5B101PR Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Linear slide pot for set point control, Relay Output

Regular price $441.52 USD

Regular price Sale price $441.52 USD
Greystone CDD5B101P Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Linear slide pot for set point control

Greystone CDD5B101P Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD, Linear slide pot for set point control

Regular price $426.19 USD

Regular price Sale price $426.19 USD
Greystone CDD5B101 Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD

Greystone CDD5B101 Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Viewable LCD

Regular price $421.12 USD

Regular price Sale price $421.12 USD
Greystone CDD5B100S Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD, Exposed push button momentary switch - N.O.

Greystone CDD5B100S Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD, Exposed push button momentary switch - N.O.

Regular price $413.44 USD

Regular price Sale price $413.44 USD
Greystone CDD5B100R Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD

Greystone CDD5B100R Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD

Regular price $423.63 USD

Regular price Sale price $423.63 USD
Greystone CDD5B100PS Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD, Linear slide pot for set point control, Exposed push button momentary switch - N.O.

Greystone CDD5B100PS Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD, Linear slide pot for set point control, Exposed push button momentary switch - N.O.

Regular price $418.53 USD

Regular price Sale price $418.53 USD
Greystone CDD5B100PR Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD, Linear slide pot for set point control, Relay Output

Greystone CDD5B100PR Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD, Linear slide pot for set point control, Relay Output

Regular price $428.74 USD

Regular price Sale price $428.74 USD
Greystone CDD5B100P Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD, Linear slide pot for set point control

Greystone CDD5B100P Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD, Linear slide pot for set point control

Regular price $413.44 USD

Regular price Sale price $413.44 USD
Greystone CDD5B100 Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD

Greystone CDD5B100 Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 0-5 or 0-10 Vdc, Concealed LCD

Regular price $408.33 USD

Regular price Sale price $408.33 USD
Greystone CDD5A101S Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Exposed push button momentary switch - N.O.

Greystone CDD5A101S Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Exposed push button momentary switch - N.O.

Regular price $426.19 USD

Regular price Sale price $426.19 USD
Greystone CDD5A101R Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Relay Output

Greystone CDD5A101R Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Relay Output

Regular price $436.38 USD

Regular price Sale price $436.38 USD
Greystone CDD5A101PS Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Linear slide pot for set point control, Exposed push button momentary switch - N.O.

Greystone CDD5A101PS Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Linear slide pot for set point control, Exposed push button momentary switch - N.O.

Regular price $431.33 USD

Regular price Sale price $431.33 USD
Greystone CDD5A101PR Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Linear slide pot for set point control, Relay Output

Greystone CDD5A101PR Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Linear slide pot for set point control, Relay Output

Regular price $441.52 USD

Regular price Sale price $441.52 USD
Greystone CDD5A101P Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Linear slide pot for set point control

Greystone CDD5A101P Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD, Linear slide pot for set point control

Regular price $426.19 USD

Regular price Sale price $426.19 USD
Greystone CDD5A101 Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD

Greystone CDD5A101 Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Viewable LCD

Regular price $421.12 USD

Regular price Sale price $421.12 USD
Greystone CDD5A100S Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD

Greystone CDD5A100S Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD

Regular price $413.44 USD

Regular price Sale price $413.44 USD
Greystone CDD5A100R Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD

Greystone CDD5A100R Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD

Regular price $423.63 USD

Regular price Sale price $423.63 USD
Greystone CDD5A100PS Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD, Linear slide pot for set point control

Greystone CDD5A100PS Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD, Linear slide pot for set point control

Regular price $418.53 USD

Regular price Sale price $418.53 USD
Greystone CDD5A100PR Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD, Linear slide pot for set point control, Relay Output

Greystone CDD5A100PR Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD, Linear slide pot for set point control, Relay Output

Regular price $428.74 USD

Regular price Sale price $428.74 USD
Greystone CDD5A100P Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD

Greystone CDD5A100P Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD

Regular price $413.44 USD

Regular price Sale price $413.44 USD
Greystone CDD5A100 Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD

Greystone CDD5A100 Room Carbon Dioxide Detector, 0-2000 ppm, Temperature & Humidity, 4-20 mA, Concealed LCD

Regular price $408.33 USD

Regular price Sale price $408.33 USD
Greystone CMD5B5110-MOD Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, two relays, status LED and Modbus communications

Greystone CMD5B5110-MOD Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, two relays, status LED and Modbus communications

Regular price $399.34 USD

Regular price Sale price $399.34 USD
Greystone CMD5B5110-BAC Carbon Monoxide Detector 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, two relays, status LED and BACnet communications

Greystone CMD5B5110-BAC Carbon Monoxide Detector 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, two relays, status LED and BACnet communications

Regular price $399.34 USD

Regular price Sale price $399.34 USD
Greystone CMD5B5110 Carbon Monoxide DetectorCO detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, two relays and status LED

Greystone CMD5B5110 Carbon Monoxide DetectorCO detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, two relays and status LED

Regular price $335.76 USD

Regular price Sale price $335.76 USD
Greystone CMD5B5100-MOD Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, relay, status LED and Modbus communications

Greystone CMD5B5100-MOD Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, relay, status LED and Modbus communications

Regular price $384.04 USD

Regular price Sale price $384.04 USD
Greystone CMD5B5100-BAC Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, relay, status LED and BACnet communications

Greystone CMD5B5100-BAC Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, relay, status LED and BACnet communications

Regular price $384.04 USD

Regular price Sale price $384.04 USD
Greystone CMD5B5100-BAC Carbon Monxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, relay and status LED

Greystone CMD5B5100-BAC Carbon Monxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, relay and status LED

Regular price $320.52 USD

Regular price Sale price $320.52 USD
Greystone CMD5B5000-MOD Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, status LED and Modbus communications

Greystone CMD5B5000-MOD Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, status LED and Modbus communications

Regular price $368.76 USD

Regular price Sale price $368.76 USD
Greystone CMD5B5000-MOD Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, status LED and BACnet communications

Greystone CMD5B5000-MOD Carbon Monoxide Detector, 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch, status LED and BACnet communications

Regular price $368.76 USD

Regular price Sale price $368.76 USD
Greystone CMD5B5000 Carbon Monoxide Detector 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch and status LED

Greystone CMD5B5000 Carbon Monoxide Detector 5% electrochem, Duct, selectable Ranges and outputs, LCD display, test switch and status LED

Regular price $305.24 USD

Regular price Sale price $305.24 USD
Greystone CMD5B1000-MOD Carbon Monoxide Detector, 5% electrochem, Room, 0-300 PPM range, 4-20mA & relay output, Modbus Communications

Greystone CMD5B1000-MOD Carbon Monoxide Detector, 5% electrochem, Room, 0-300 PPM range, 4-20mA & relay output, Modbus Communications

Regular price $206.08 USD

Regular price Sale price $206.08 USD
Greystone CMD5B1000-MOD Carbon Monoxide Detector, 5% electrochem, Room, 0-300 PPM range, Modbus Communications

Greystone CMD5B1000-MOD Carbon Monoxide Detector, 5% electrochem, Room, 0-300 PPM range, Modbus Communications

Regular price $188.04 USD

Regular price Sale price $188.04 USD
Greystone CMD55-CALPCB Carbon Monoxide Detector, 5% electrochem, Room, 0-300 PPM range 4-20mA output

Greystone CMD55-CALPCB Carbon Monoxide Detector, 5% electrochem, Room, 0-300 PPM range 4-20mA output

Regular price $190.80 USD

Regular price Sale price $190.80 USD
Greystone RH110B05C1A2 5% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-50C(32-122F) temperature range.

Greystone RH110B05C1A2 5% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-50C(32-122F) temperature range.

Regular price $182.93 USD

Regular price Sale price $182.93 USD
Greystone RH110B05C1A1 5% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-35C(32-95F) temperature range.

Greystone RH110B05C1A1 5% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-35C(32-95F) temperature range.

Regular price $182.93 USD

Regular price Sale price $182.93 USD
Greystone RH110B03C1A2 3% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-50C(32-122F) temperature range.

Greystone RH110B03C1A2 3% designer humidity & temp transmitter, 24 Vdc supply, 4-20mA output and 0-50C(32-122F) temperature range.

Regular price $235.23 USD

Regular price Sale price $235.23 USD

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Collection: Indoor Air Quality (IAQ) and Combo Sensors

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