Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
Dwyer Humidity/Temp Transducer: 4 to 20mA DC, Type II Thermistor (10K @ 25°C) - Duct-Mount Temperature & Humidity Transmitters
DwyerDuct-Mount Temperature & Humidity Transmitters

Dwyer Humidity/Temp Transducer: 4 to 20mA DC, Type II Thermistor (10K @ 25°C)

The Dwyer RHP-3D1B is a duct-mount temperature and humidity transmitter with a 4 to 20mA DC output. It features a Type II Thermistor (10K @ 25°C) sensing element, humidity accuracy of 3%, and temperature accuracy of…

SKU 3G-OTH-180775

Brand
Dwyer
Item
Humidity/Temp Transducer: 4 to 20mA DC, Type II Thermistor
Category
Duct-Mount Temperature & Humidity Transmitters
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

Dwyer
Manufacturer Part Number
RHP-3D1B
Type
Type II Thermistor (10K @ 25°C), Screw Terminals, RHP
Output
4 to 20mA DC
Power Source
10 to 35V DC
Humidity Accuracy
3%
Temperature Range
-4 °F to 140 °F
Sensing Element Type
Type II Thermistor (10K @ 25°C)
Temperature Accuracy
±0.36°F @ 77°F
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The Dwyer RHP-3D1B is a duct-mount temperature and humidity transmitter with a 4 to 20mA DC output. It features a Type II Thermistor (10K @ 25°C) sensing element, humidity accuracy of 3%, and temperature accuracy of ±0.36°F @ 77°F. The device operates on a 10 to 35V DC power source and measures temperatures from -4 °F to 140 °F.

Frequently Asked Questions

What is the Dwyer RHP-3D1B humidity/temp transducer used for?

The Dwyer RHP-3D1B is a duct-mount transmitter used in HVAC systems to monitor and control temperature and humidity in air handling ducts. It provides a 4 to 20mA DC output for integration with building automation systems, ensuring precise environmental regulation in commercial and industrial facilities.

What are the specifications of the Dwyer RHP-3D1B?

The Dwyer RHP-3D1B features a Type II Thermistor (10K @ 25°C) sensing element, humidity accuracy of 3%, and temperature accuracy of ±0.36°F @ 77°F. It operates on 10 to 35V DC power, measures temperatures from -4 °F to 140 °F, and outputs 4 to 20mA DC via screw terminals.

Where to buy the Dwyer RHP-3D1B worldwide?

You can source the Dwyer RHP-3D1B through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide competitive pricing and reliable sourcing for this Dwyer transducer.

How to install the Dwyer RHP-3D1B duct-mount transmitter?

Mount the Dwyer RHP-3D1B in a duct using the provided flange, ensuring the sensing element is exposed to airflow. Connect 10 to 35V DC power and wire the 4 to 20mA output to your controller via screw terminals. Follow Dwyer's manual for proper orientation and avoid condensation on the sensor.

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.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Type III Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHPX-3SDAA-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Type III Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Type III Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHPX-3SDAA-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Type III Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 0 to 10V DC, Type III Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHP-3D2A). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Type III Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 0 to 10V DC, Type III Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHP-3D2A). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Type III Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 4 to 20mA DC, 0 to 5V DC Solid State Band Gap, Screw Terminals, RHP (MPN RHPX-3SDA0-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: 0 to 5V DC Solid State Band Gap; Temperature Accuracy: ±0.9°F at 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 4 to 20mA DC, 0 to 5V DC Solid State Band Gap, Screw Terminals, RHP (MPN RHPX-3SDA0-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: 0 to 5V DC Solid State Band Gap; Temperature Accuracy: ±0.9°F at 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Pt1000 RTD, Screw Terminals, 1/2 in NPS, 9 in Probe Lg (MPN RHPX-3SDAE-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Pt1000 RTD; Temperature Accuracy: ±0.54°F @ 32°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Pt1000 RTD, Screw Terminals, 1/2 in NPS, 9 in Probe Lg (MPN RHPX-3SDAE-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Pt1000 RTD; Temperature Accuracy: ±0.54°F @ 32°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Type II Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHP-2D1B). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Type II Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Type II Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHP-2D1B). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Type II Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Type III Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHPX-2SDAA-00). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Type III Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Type III Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHPX-2SDAA-00). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Type III Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.

More from Dwyer

View all Dwyer parts →
DWYER Temp/Humidity Transmitter: 4 to 20 mA, 158°F Op Temp - Max, 32°F Op Temp - Min, RHCN-7000 (MPN 124317-94). Key specifications — Brand: DWYER; Output: 4 to 20 mA; Power Source: 110V AC.
Dwyer
DWYER Temp/Humidity Transmitter: 4 to 20 mA, 158°F Op Temp - Max, 32°F Op Temp - Min, RHCN-7000 (MPN 124317-94). Key specifications — Brand: DWYER; Output: 4 to 20 mA; Power Source: 110V AC.
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Thermistor (20K @ 25°C), Screw Terminals, 1/2 in NPS (MPN RHPX-3SDA0-00). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Thermistor (20K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Thermistor (20K @ 25°C), Screw Terminals, 1/2 in NPS (MPN RHPX-3SDA0-00). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Thermistor (20K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 0 to 10V DC, Type III Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHPX-2SDAA-00). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Type III Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 0 to 10V DC, Type III Thermistor (10K @ 25°C), Screw Terminals, RHP (MPN RHPX-2SDAA-00). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Type III Thermistor (10K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Thermistor (20K @ 25°C), Screw Terminals, 1/2 in NPS (MPN RHPX-3SDAF-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Thermistor (20K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 4 to 20mA DC, Thermistor (20K @ 25°C), Screw Terminals, 1/2 in NPS (MPN RHPX-3SDAF-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Thermistor (20K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 4 to 20mA DC; Power Source: 10 to 35V DC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 0 to 10V DC, Thermistor (20K @ 25°C), Screw Terminals, 1/2 in NPS (MPN RHPX-3SDAF-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Thermistor (20K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 0 to 10V DC, Thermistor (20K @ 25°C), Screw Terminals, 1/2 in NPS (MPN RHPX-3SDAF-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: Thermistor (20K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 0 to 10V DC, 0 to 5V DC Solid State Band Gap, Screw Terminals, RHP (MPN RHPX-3SDA0-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: 0 to 5V DC Solid State Band Gap; Temperature Accuracy: ±0.9°F at 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 0 to 10V DC, 0 to 5V DC Solid State Band Gap, Screw Terminals, RHP (MPN RHPX-3SDA0-00). Key specifications — Brand: DWYER; Humidity Accuracy: 3%; Sensing Element Type: 0 to 5V DC Solid State Band Gap; Temperature Accuracy: ±0.9°F at 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
DWYER Humidity/Temp Transducer: 0 to 10V DC, Thermistor (20K @ 25°C), Screw Terminals, 1/2 in NPS (MPN RHPX-2SDAF-00). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Thermistor (20K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
Dwyer
DWYER Humidity/Temp Transducer: 0 to 10V DC, Thermistor (20K @ 25°C), Screw Terminals, 1/2 in NPS (MPN RHPX-2SDAF-00). Key specifications — Brand: DWYER; Humidity Accuracy: 2%; Sensing Element Type: Thermistor (20K @ 25°C); Temperature Accuracy: ±0.36°F @ 77°F; Output: 0 to 10V DC; Power Source: 15 to 35V DC; 15 to 29V AC; Temperature Range: -4 °F to 140 °F.
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.
Dwyer
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.