What applications is this transmitter suitable for?

It is suitable for demand control ventilation in schools, office buildings, hospitals, and other indoor environments to help achieve energy savings.

How can tampering be prevented?

To prevent tampering, the action of the buttons can be locked out using an internal dip switch selection.

TEMPERATURE TRANSMITTERS

Name: DWYER CDT-2N40/CDT-2D40 SERIES CDT CARBON DIOXIDE/TEMPERATURE TRANSMITTERS
Brand: BNSENS Co., Ltd.
SKU: 2271932915

Jiangsu, ChinaBNSENS Co., Ltd.

US$470.00-680.00

1 Piece

Sample price:US$480.00/piece.Request sample

Product profile

Customization

Available

Type

Wall-Mounted Current Type

Measuring Medium

Temperature

Model NO.

CDT-2N40

Accuracy

CO2: ±40 PPM + 3% of reading (2000 PPM CO2); ± 50

Certification

Customized

Non-Customized

Condition

Original New

Sensor

NDIR, 15 year life expectancy

Range

CO2: 0 to 2000 or 0 to 5000 PPM (depending on mode

Response Time

2 min for 90% step change

Temperature Limits

32 to 122°F (0 to 50°C)

Humidity Limits

0 to 85% (non-condensing)

Power Requirements

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

Transport Package

Carton

Trademark

DWYER

Origin

Amercia

Key features

Dual CO2 and Temp Monitoring: Combines carbon dioxide and temperature measurements into one wall-mounted transmitter.

High Accuracy NDIR Sensor: NDIR sensor with 15-year life expectancy and automatic baseline correction for minimal maintenance.

Flexible Output Options: Offers 4-20 mA, 0-5 VDC, or 0-10 VDC outputs to work with virtually any building management controller.

Energy Saving Features: Includes barometric pressure adjustment and low energy consumption to help achieve energy savings.

Visual Indication and Security: Optional LCD display and front LED for CO2 levels >1100 PPM; internal dip switch locks buttons to prevent tampering.

School Compliance Option: Available with -S option to comply with DSA requirements for monitoring CO2 levels in schools.

CE Certified Quality: Product holds CE certification ensuring compliance with European safety and quality standards.

Company profile

Importers and ExportersFast DeliveryQuality Assurance100% Finished Products Inspection

BNSENS Co., Ltd.

Jiangsu, China

Business Type: Manufacturer/FactoryAverage Response Time: ≤2.54h

AI-Powered supplier vetting

SummaryBNSENS Co., Ltd. is identified as a Chinese manufacturer/factory in Jiangsu specializing in sensors and transmitters for pressure, level, temperature, flow, current, switching, and position applications. The supplier describes MEMS and independently developed ASIC expertise, a U.S.-based R&D center, and supply or cooperation relationships involving Emerson, SICK, TSMC, Siemens, Infineon, and Rohm. Its products are reported as serving multiple industrial sectors, and an audit was conducted by BV; however, the audit result and type are provided only as codes, so certification or compliance conclusions cannot be made. Information on after-sales service, financial credibility, quality systems, customization, sustainability, and several R&D services is insufficient. The stated registered capital is omitted from this assessment for privacy.

Supplier typeThe supplier is explicitly identified as a Manufacturer/Factory and a high-tech enterprise specializing in sensor development, manufacturing, and trade. Its stated business scope is Electrical & Electronics, and its listed products cover multiple sensor and transmitter categories.

R&D capabilityBNSENS describes a sensor R&D center in Minnesota, core MEMS-chip technology, independently developed ASIC chips, German-origin production-line introduction, and development of additional industrial-control sensors. These statements provide explicit evidence of R&D and technology activity, although the scope and verification of the capabilities are not further documented.

Production capacityThe supplier is classified as a factory and states that it develops and manufactures a broad range of sensor products. Its history includes a sensor production-line introduction and factory relocation, while reported use across oil, gas, power, chemical, metallurgy, food, environmental protection, aerospace, and municipal applications supports production experience; actual capacity, equipment scale, and output data are not provided.

Client casesThe supplier reports that its products are used across numerous industries and cites relationships or sales involving Emerson, SICK, TSMC, Siemens in Vietnam, Infineon, and Rohm. These are explicit customer or business-cooperation claims, but the slices do not provide project details, order scope, duration, or independently verified case evidence.

Product Q&A

Q:What is the sensor type and lifespan?

The transmitter uses an NDIR sensor with a 15-year life expectancy and features Automatic Baseline Correction (ABC) to account for sensor drift.

Q:What are the available output signals?

The CO2 universal output allows users to select between 4-20 mA, 0-5 VDC, or 0-10 VDC to work with virtually any building management controller.

Q:Is the product customizable?

No, the product is listed as Non-Customized. It is available in standard configurations for wall-mount or duct mount.

Q:Can the device be used in schools for compliance?

Yes, the Series CDT CO2 transmitters are available with a -S option that provides the necessary attributes to be compliant with DSA requirements for monitoring CO2 levels in schools.

Q:What are the power requirements?

The device requires 16-35 VDC or 19-28 VAC. Average power consumption is 2 W, with a peak of 3.75 W.