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Dwyer Humidity Transmitter: 1/2 in NPT, 4 to 20 mA, 0%to 100% Relative Humidity Range - Hazardous Location Transmitters
DwyerHazardous Location Transmitters

Dwyer Humidity Transmitter: 1/2 in NPT, 4 to 20 mA, 0%to 100% Relative Humidity Range

The Dwyer HHT-IU is a hazardous location humidity transmitter with a 1/2 in NPT connection, offering a 4 to 20 mA output and a 0% to 100% relative humidity range. It operates on a 9.5 to 28V DC power supply and is FM…

SKU 3G-OTH-187112

Brand
Dwyer
Item
Humidity Transmitter: 1/2 in NPT, 4 to 20 mA, 0%to 100% Relative Humidity Range
Category
Hazardous Location Transmitters
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Technical Specifications

Dwyer
Manufacturer Part Number
HHT-IU
Type
4 to 20 mA, Female
Relative Humidity Range
0%to 100%
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Dwyer Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Dwyer HHT-IU is a hazardous location humidity transmitter with a 1/2 in NPT connection, offering a 4 to 20 mA output and a 0% to 100% relative humidity range. It operates on a 9.5 to 28V DC power supply and is FM approved.

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 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 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.
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 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.
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.
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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 124317-94). Key specifications — Brand: DWYER; Output: 4 to 20 mA; Power Source: 110V AC.
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DWYER Humidity Transmitter: 1/2 in NPT, 4 to 20 mA, 0%to 100% Relative Humidity Range, Female (MPN HHT-EU). Key specifications — attr1118745: DWYER; attr1118752: CE; attr1118763: 16.5 to 28V DC.
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DWYER Humidity Transmitter: 1/2 in NPT, 4 to 20 mA, 0%to 100% Relative Humidity Range, Female (MPN HHT-EU). Key specifications — attr1118745: DWYER; attr1118752: CE; attr1118763: 16.5 to 28V DC.
DWYER Temperature/Humidity Transmitter: 1/2 in NPT, -40 to 140 Degrees F, 4 to 20 mA, Female (MPN HHT-IT). Key specifications — attr1118745: DWYER; attr1118752: Intrinsically Safe; attr1118770: Solid State Band Gap; attr1118777: ±0.9°F @ 77°F; attr1118763: 9.5 to 28V DC; attr1118746: -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). Key specifications — attr1118745: DWYER; attr1118752: Intrinsically Safe; attr1118770: Solid State Band Gap; attr1118777: ±0.9°F @ 77°F; attr1118763: 9.5 to 28V DC; attr1118746: -40 °F to 140 °F.