Dwyer Instruments CDT-2D40 | Carbon Dioxide Transmitter | Duct mount | 2000 ppm CO2 range | 4 to 20 mA / 0 to (5 or 10) VDC CO2 output

Name: Dwyer Instruments CDT-2D40 | Carbon Dioxide Transmitter | Duct mount | 2000 ppm CO2 range | 4 to 20 mA / 0 to (5 or 10) VDC CO2 output
Brand: Dwyer
SKU: CDT-2D40
Rating: 5 (1 reviews)

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Part Number : CDT-2D40

The Series CDT, Model CDT-2D40 is a Carbon Dioxide and Temperature Transmitter that precisely measures the CO2 concentration and temperature in interior spaces, helping to save energy. The Series CDT incorporates barometric pressure adjustment to provide even higher precision. To interact with almost any building management controller, customers can choose the transmitter output to be 4-20 mA, 0-5 VDC, or 0-10 VDC using the CO2 universal output. The wall mount variants of the Series CDT can be supplied with an integrated LCD display for applications that need visual indication. An internal dip switch selection can be used to lock out button operation to avoid tampering. The -S option for the Series CDT CO2 transmitters offers the features and characteristics required to meet DSA regulations for CO2 level monitoring in schools. A front-facing LED becomes visible when the CO2 concentration rises above 1100 PPM.

Specification
Features
Catalog

Specifications

Details

Manufacturer

Dwyer Instruments

Type

Carbon Dioxide and Temperature Transmitters

Range

CO2: 0 to 2000 or 0 to 5000 PPM (depending on model)
Temperature: 32 to 122°F (0 to 50°C)

Accuracy

CO2: ±40 PPM + 3% of reading (2000 PPM CO2)
± 50 PPM + 5% of reading (5000 PPM CO2)
RH: ±2% (10 to 90% RH) (for units configured with humidity output)
Temperature: ±1°C @ 25°C

Response Time

2 min for 90% step change

Maximum operating temperature

32 to 122°F (0 to 50°C)

Humidity

Limits: 0 to 85% (non-condensing)

Power

16-35 VDC or 19-28 VAC

POWER CONSUMPTION

Average: 2 w
Peak: 3.75 w

Output

Current: 4-20 mA (max. 500 Ω)
Voltage: 0-5 VDC or 0-10 VDC (min. 500 Ω)
Relay: SPST NO rated 2A @ 30 VDC
RTD or thermistor per Resistance vs. Temperature Table (depending on model)

Approvals