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Dwyer Humidity Sensor: 4 to 20 mA, Screw Terminals, -4°F to 140°F - Indoor Wall-Mount Transmitters
DwyerIndoor Wall-Mount Transmitters

Dwyer Humidity Sensor: 4 to 20 mA, Screw Terminals, -4°F to 140°F

The Dwyer RHP-3N40-LCD is an indoor wall-mount humidity transmitter with a 4 to 20 mA output. It operates over a temperature range of -4 °F to 140 °F and a relative humidity range of 0% to 100%.

SKU 3G-OTH-179233

Brand
Dwyer
Item
Humidity Sensor: 4 to 20 mA, Screw Terminals, -4°F to 140°F
Category
Indoor Wall-Mount Transmitters
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Technical Specifications

Dwyer
Manufacturer Part Number
RHP-3N40-LCD
Type
Screw Terminals, -4°F to 140°F
Output
4 to 20 mA
Temperature Range
-4 °F to 140 °F
Relative Humidity Range
0%to 100%
View Full Spec Sheet

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

Product Description

The Dwyer RHP-3N40-LCD is an indoor wall-mount humidity transmitter with a 4 to 20 mA output. It operates over a temperature range of -4 °F to 140 °F and a relative humidity range of 0% to 100%.

Frequently Asked Questions

What is the Dwyer RHP-3N40-LCD humidity sensor used for?

The Dwyer RHP-3N40-LCD is an indoor wall-mount transmitter that measures relative humidity from 0% to 100% and temperature from -4 °F to 140 °F. It is commonly used in HVAC, cleanroom, and building automation systems to monitor and control environmental conditions.

What are the specifications of the Dwyer RHP-3N40-LCD?

The Dwyer RHP-3N40-LCD has a 4 to 20 mA output, operates over a temperature range of -4 °F to 140 °F, and measures relative humidity from 0% to 100%. It features screw terminals for wiring and an LCD display. The manufacturer part number is RHP-3N40-LCD.

Where to buy the Dwyer RHP-3N40-LCD worldwide?

3G Electric supplies the Dwyer RHP-3N40-LCD humidity transmitter worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the Dwyer RHP-3N40-LCD humidity transmitter?

Mount the Dwyer RHP-3N40-LCD on an indoor wall at a representative location away from direct sunlight or drafts. Connect the 4 to 20 mA output to your control system using the screw terminals. Follow standard wiring practices and consult the manufacturer's manual for detailed instructions.

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 indoor wall-mount transmitters. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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