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Dwyer Humidity/Temp Transducer: 4 to 20mA DC, Thermistor (20K @ 25°C), Screw Terminals - Duct-Mount Temperature & Humidity Transmitters
DwyerDuct-Mount Temperature & Humidity Transmitters

Dwyer Humidity/Temp Transducer: 4 to 20mA DC, Thermistor (20K @ 25°C), Screw Terminals

The Dwyer RHPX-3SDAF-00 is a duct-mount temperature and humidity transmitter with a 4 to 20mA DC output. It operates on a 10 to 35V DC power source and uses a thermistor (20K @ 25°C) sensing element. The device…

SKU 3G-OTH-180772

Brand
Dwyer
Item
Humidity/Temp Transducer: 4 to 20mA DC, Thermistor
Category
Duct-Mount Temperature & Humidity Transmitters
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Technical Specifications

Dwyer
Manufacturer Part Number
RHPX-3SDAF-00
Type
Thermistor (20K @ 25°C), Screw Terminals
NPS
1/2 in
Output
4 to 20mA DC
Power Source
10 to 35V DC
Humidity Accuracy
3%
Temperature Range
-4 °F to 140 °F
Sensing Element Type
Thermistor (20K @ 25°C)
Temperature Accuracy
±0.36°F @ 77°F
View Full Spec Sheet

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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dwyer RHPX-3SDAF-00 is a duct-mount temperature and humidity transmitter with a 4 to 20mA DC output. It operates on a 10 to 35V DC power source and uses a thermistor (20K @ 25°C) sensing element. The device offers a humidity accuracy of 3% and a temperature accuracy of ±0.36°F @ 77°F, with a temperature range of -4 °F to 140 °F.

Frequently Asked Questions

What is the Dwyer RHPX-3SDAF-00 used for?

The Dwyer RHPX-3SDAF-00 is a duct-mount transmitter that measures both humidity and temperature in HVAC systems. It outputs a 4 to 20mA DC signal for integration with building automation or control panels, making it suitable for environmental monitoring in commercial or industrial air-handling units.

What are the specifications of the Dwyer RHPX-3SDAF-00?

The Dwyer RHPX-3SDAF-00 has a humidity accuracy of 3% and temperature accuracy of ±0.36°F @ 77°F. It uses a thermistor (20K @ 25°C) sensing element, operates on 10 to 35V DC, and covers a temperature range of -4 °F to 140 °F. Output is 4 to 20mA DC with screw terminals and a 1/2 in NPS connection.

Where to buy the Dwyer RHPX-3SDAF-00 worldwide?

3G Electric supplies the Dwyer RHPX-3SDAF-00 to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance for international orders. Contact us for pricing and lead time on this duct-mount humidity and temperature transmitter.

How to install the Dwyer RHPX-3SDAF-00?

Mount the Dwyer RHPX-3SDAF-00 in a duct using the 1/2 in NPS fitting, ensuring the sensing element is exposed to airflow. Wire the 4 to 20mA DC output to your controller via the screw terminals, and connect a 10 to 35V DC power source. Follow Dwyer's manual for proper orientation and calibration.

Used in

Common applications for Dwyer
Combustion air-filter monitoring — Magnehelic Series 2000 on burner air-intake filter banks
Clean-room and pharmaceutical pressurisation — Magnehelic / Capsuhelic differential-pressure gauges
HVAC fan-discharge static pressure — Mark II inclined-vertical manometers on AHU test points
Filter-blockage alarms — Photohelic Series 3000 combined gauge/switch on air-handling units
BMS-integrated pressure monitoring — Digihelic DH3 with 4–20 mA output for building management

Dwyer Products

3G Electric supplies Dwyer duct-mount temperature & humidity transmitters. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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DWYER Humidity/Temp Transducer: 0 to 10V DC, Pt100 RTD, Screw Terminals, 1/2 in NPS, 9 in Probe Lg (MPN RHP-2D2D). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Pt100 RTD; Temperature Accuracy: ±0.54°F @ 32°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
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