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Dwyer Instruments
Dwyer CDT Carbon Dioxide & Temperature Transmitter
Quote on request
No online payment · add lines to RFQ BOM
Dwyer CDT: CO2 0–2000/5000 ppm NDIR; T 0–50 °C; 4–20 mA/0–10 V. RFQ.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
CO2 0–2000 or 0–5000 ppm (model dependent); Temperature 32 to 122 °F (0 to 50 °C)
Accuracy
CO2 ±40 ppm + 3% of reading (2000 ppm range class per DS)
Output
Universal 4–20 mA / 0–5 VDC / 0–10 VDC (jumper selectable); optional passive thermistor/RTD temperature
Supply
16–35 VDC or 19–28 VAC
Protection
Duct mount NEMA 4X (IP66) housing; wall mount IP20
Ambient temperature
32 to 122 °F (0 to 50 °C)
Fits IAQ CO2 and temperature sensing where you need a Dwyer CDT—NDIR CO2 transmitter with 0–2000 or 0–5000 ppm ranges, temperature 32 to 122 °F (0 to 50 °C), universal 4–20 mA / 0–5 / 0–10 VDC outputs, and duct NEMA 4X or wall IP20 housings.
Key advantages
- CO2 — 0–2000 or 0–5000 ppm NDIR
- Accuracy — ±40 ppm + 3% of reading class
- Temperature — 0 to 50 °C
- Outputs — 4–20 mA / 0–5 / 0–10 VDC selectable
- Mount — Duct NEMA 4X (IP66) or wall IP20
Typical applications
- HVAC IAQ.
- Classroom CO2.
- BAS ventilation control.
Selection guide
- Range 2000 vs 5000
- Wall vs duct
- LCD option
Common mistakes
- Wrong power VAC/VDC.
- Condensing RH.
- Sensor in stagnant corner.
When to RFQ / what to tell us
- Range/mount/output.
- Quantity, ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 45409 |
| Brand | Dwyer Instruments |
| Model | CDT |
| Product type | CO2 Temperature Transmitter |
| Measuring range | CO2 0–2000 or 0–5000 ppm (model dependent); Temperature 32 to 122 °F (0 to 50 °C) |
| Accuracy | CO2 ±40 ppm + 3% of reading (2000 ppm range class per DS) |
| Output signal | Universal 4–20 mA / 0–5 VDC / 0–10 VDC (jumper selectable); optional passive thermistor/RTD temperature |
| Supply voltage | 16–35 VDC or 19–28 VAC |
| IP rating | Duct mount NEMA 4X (IP66) housing; wall mount IP20 |
| Ambient temperature | 32 to 122 °F (0 to 50 °C) |
| Sensor type | NDIR CO2 sensor (15-year life expectancy) + temperature |
| Display | Optional integral LCD on wall-mount configurations |
Documents
FAQ
Q: CO2 ranges? A: 0–2000 or 0–5000 ppm.
Q: Sensor? A: NDIR (~15-year life expectancy).
Q: What should I send for a quote? A: Range/mount/output, quantity, ship-to.
Links
- Request a Quote
- Get selection help
- Category-Detectors/)
| Parameter | Value |
|---|---|
| Measuring range | CO2 0–2000 or 0–5000 ppm (model dependent); Temperature 32 to 122 °F (0 to 50 °C) |
| Accuracy | CO2 ±40 ppm + 3% of reading (2000 ppm range class per DS) |
| Output | Universal 4–20 mA / 0–5 VDC / 0–10 VDC (jumper selectable); optional passive thermistor/RTD temperature |
| Supply | 16–35 VDC or 19–28 VAC |
| Protection | Duct mount NEMA 4X (IP66) housing; wall mount IP20 |
| Ambient temperature | 32 to 122 °F (0 to 50 °C) |
| Display | Optional integral LCD on wall-mount configurations |
| Approvals | CE |
| Mounting | Wall or duct mount housings |
| Sensor type | NDIR CO2 sensor (15-year life expectancy) + temperature |
| Notes | Series CDT CO2 & temperature transmitter for HVAC/demand-control ventilation. Specs from Dwyer CDT datasheet (assets.dwyeromega.com OEM CDN; branded dwyer-inst.com). |
| Response Time | 2 minutes for 99% CO2 step change |