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Dwyer Temperature/Humidity Transmitter: 1/2 in NPT, -40 to 140 Degrees F, 4 to 20 mA - Hazardous Location Transmitters
DwyerHazardous Location Transmitters

Dwyer Temperature/Humidity Transmitter: 1/2 in NPT, -40 to 140 Degrees F, 4 to 20 mA

The DWYER HHT-IT is an intrinsically safe hazardous location transmitter that measures temperature and humidity. It features a solid state band gap sensor, a 4 to 20 mA output, and operates on 9.5 to 28V DC. The…

SKU 3G-OTH-187113

Brand
Dwyer
Item
Temperature/Humidity Transmitter: 1/2 in NPT, -40 to 140 Degrees F, 4 to 20 mA
Category
Hazardous Location Transmitters
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Technical Specifications

Dwyer
Manufacturer Part Number
HHT-IT
Type
-40 to 140 Degrees F, 4 to 20 mA, Female
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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The DWYER HHT-IT is an intrinsically safe hazardous location transmitter that measures temperature and humidity. It features a solid state band gap sensor, a 4 to 20 mA output, and operates on 9.5 to 28V DC. The transmitter has a temperature range of -40 °F to 140 °F with an accuracy of ±0.9°F @ 77°F, and connects via a 1/2 in NPT female fitting.

Frequently Asked Questions

What is the Dwyer HHT-IT temperature/humidity transmitter used for?

The Dwyer HHT-IT is used for measuring temperature and humidity in hazardous locations where intrinsic safety is required. It is suitable for industrial environments such as chemical plants, oil and gas facilities, and refineries where explosive gases or dusts may be present.

What are the specifications of the Dwyer HHT-IT transmitter?

The Dwyer HHT-IT features a solid state band gap sensor, measures -40 °F to 140 °F with ±0.9°F accuracy at 77°F, and outputs 4 to 20 mA. It operates on 9.5 to 28V DC, has a 1/2 in NPT female connection, and is intrinsically safe for hazardous locations.

Where to buy the Dwyer HHT-IT transmitter worldwide?

You can source the Dwyer HHT-IT transmitter from 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.

How to install the Dwyer HHT-IT transmitter?

Install the Dwyer HHT-IT by mounting it via the 1/2 in NPT female fitting in a suitable enclosure. Ensure the area is classified as intrinsically safe per local codes. Connect the 4 to 20 mA loop to a 9.5 to 28V DC power source. Follow Dwyer's manual for wiring 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 hazardous location 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 Temperature/Humidity Transmitter: 1/2 in NPT, -40 to 140 Degrees F, 4 to 20 mA, Female (MPN HHT-IT-LCD). Key specifications — Brand: DWYER; Standards: Intrinsically Safe; Sensing Element Type: Solid State Band Gap; Temperature Accuracy: ±0.9°F @ 77°F; Power Required: 9.5 to 28V DC; Temperature Range: -40 °F to 140 °F.
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DWYER Temperature/Humidity Transmitter: 1/2 in NPT, -40 to 140 Degrees F, 4 to 20 mA, Female (MPN HHT-IT-LCD). Key specifications — Brand: DWYER; Standards: Intrinsically Safe; Sensing Element Type: Solid State Band Gap; Temperature Accuracy: ±0.9°F @ 77°F; Power Required: 9.5 to 28V DC; Temperature Range: -40 °F to 140 °F.
DWYER Humidity Transmitter: 1/2 in NPT, 4 to 20 mA, 0%to 100% Relative Humidity Range, Female (MPN HHT-EU-LCD). Key specifications — Brand: DWYER; Standards: FM; Power Required: 16.5 to 28V DC.
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DWYER Temp/Humidity Transmitter: 4 to 20 mA, 158°F Op Temp - Max, 32°F Op Temp - Min, RHCN-7000 (MPN 124317-90). Key specifications — Brand: DWYER; Output: 4 to 20 mA; Power Source: 110V AC.
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DWYER Temp/Humidity Transmitter: 4 to 20 mA, 158°F Op Temp - Max, 32°F Op Temp - Min, RHCN-7000 (MPN 124317-90). Key specifications — Brand: DWYER; Output: 4 to 20 mA; Power Source: 110V AC.
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DWYER Temp/Humidity Transmitter: 4 to 20 mA, 158°F Op Temp - Max, 32°F Op Temp - Min, RHCN-7000 (MPN 124317-92). Key specifications — Brand: DWYER; Output: 4 to 20 mA; Power Source: 110V AC.
DWYER Temp/Humidity Transmitter: 4 to 20 mA, 158°F Op Temp - Max, 32°F Op Temp - Min, RHCN-7000 (MPN 124317-95). Key specifications — Brand: DWYER; Output: 4 to 20 mA; Power Source: 230V AC.
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