• Dwyer HHT Intrinsically Safe Humidity/Temperature Transmitter

Dwyer HHT Intrinsically Safe Humidity/Temperature Transmitter

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Dwyer Instruments

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Rp.36.563.400
Availability:
4 - 6 WEEKS
Product Code:
HHT
Brand:
Dwyer Instruments
Update Terakhir:
22 Jun 2023
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The Dwyer HHT Hazardous Area Humidity/Temperature Transmitter takes accurate measurements in the harshest of environments. The transmitter is offered in explosion-proof and intrinsically-safe versions depending on the application's requirements. The explosion-proof model is offered with 4 to 20 mA output for humidity only. The intrinsically-safe version is offered with 4 to 20 mA output for humidity and temperature. Both versions have an optional two line alphanumeric display to show the current humidity and temperature.

The Series HHT humidity/temperature transmitter is excellent for offshore HVAC applications, dust and grain applications. Intrinsically safe models require an intrinsically safe barrier.


  • Relative Humidity Range: 0 to 100% RH
  • Temperature Range: -40 to 140°F (-40 to 60°C)
  • Accuracy: ±2% 10-90% RH, ±0.9°F at 72°F (±0.3°C at 25°C)
  • Repeatability: ±0.1% typical
  • Temperature compensated over entire range
  • 4-20 mA output, 2 channels for humidity/temperature models (loop power on RH)
  • Screw terminal block electrical connection
  • Conduit Connection: 1/2" female NPT
  • Capacitance polymer RH sensor
  • Solid state band gap temperature sensor
  • Aluminum housing
  • Optional 2 line alpha numeric display
  • CE, FM approved
  • NEMA 4X (IP66) rated enclosure
  • Approvals:
  • HHT-EX: FM Explosion-proof, Class I Div. 1 Group B, C, D, Class II Div. 1 Group E, F, G, Class III Div. 1
  • HHT-IX: FM Intrinsically Safe, Class I Div. 1 Group A, B, C, D, Class II Div. 1 Group E, F, G, Class III Div. 1 T4

  • Relative Humidity Range: 0 to 100% RH.
  • Temperature Range: -40 to 140°F (-40 to 60°C).
  • Accuracy: ±2% 10 to 90% RH, ±0.9°F at 72°F (±0.3°C at 25°C).
  • Hysteresis: ±1%.
  • Repeatability: ±0.1% typical.
  • Temperature Limits: -40 to 140°F (-40 to 60°C).
  • Storage Temperature: -40 to 176°F (-40 to 80°C).
  • Compensated Temperature: -40 to 140°F (-40 to 60°C).
  • Power Requirements: For intrinsically safe models HHT-IX, 9.5 to 28
  • VDC. For explosion-proof models HHT-EX, 16.5 to 28 VDC.
  • Output Signal: 4 to 20 mA, 2 channels for humidity/temperature models (loop power on RH).
  • Response Time: 15 seconds.
  • Electrical Connections: Screw terminal block.
  • Conduit Connection: 1/2 female NPT.
  • Drift: <1% RH/year.
  • RH Sensor: Capacitance polymer.
  • Temperature Sensor: Solid state band gap.
  • Housing Material: Aluminum.
  • Display: Optional 2 line alpha numeric, 8 characters/line. Temperature
  • display is °F/°C selectable.
  • Display Resolution: RH: 0.1%: Temperature 0.1°F (0.1°C).
  • Weight: 2 lb 8 oz (1134 g).
  • Enclosure Rating:
  • NEMA 4X (IP66). Models HHT-EX: FM ExplosionProof, Class I Div. 1 Group B, C, D, Class II Div. 1 Group E, F, G, Class
  • III Div. 1; Models HHT-IX: FM Intrinsically Safe, Class I Div. 1 Group A,
  • B, C, D, Class II Div. 1 Group E, F, G, Class III Div. 1 T4.
  • Agency Approvals: CE, FM.

  • (1) HHT Intrinsically Safe Humidity/Temperature Transmitter
  • (1) Instruction Manual

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