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Series HHT Hazardous Area Humidity/Temperature Transmitter
Brand: Dwyer Instruments, LLCThe Series HHT Hazardous Area Humidity/Temperature Transmitter takes accurate measurements in the harshest of environments.
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, and do require an intrinsically safe barrier to meet hazardous area approvals.
Features- FM Approved Explosion-proof and Intrinsically Safe Models
- Integral LCD Option
- Replaceable Calibrated Sensor for Long Term Use in Harsh Environments
- Dual Temperature and Relative Humidity Output Models
1 - 8 of 8 Part Numbers
HHT-E
- Protection - Explosion-Proof
- Display - Not Required
HHT-E-LCD
- Protection - Explosion-Proof
- Display - LCD Display
HHT-IU-LCD
- Protection - Intrinsically Safe
- Model - Humidity
- Display - LCD Display
1 - 8 of 8 Part Numbers
Specifications
Brand
Accessories
- Mounting Brackets
Accuracy
- ± 0.3° C at 25° C (± 0.9° F at 72° F)
- ± 2 % (10 to 90 %) - RH
Approvals & Certifications
- CE
- FM
Compensated Temperature
- -40° to 60° C (-40° to 140° F)
Conduit Connection
- 1/2” NPT Female
Display
- 2 Line Alpha Numeric, 8-Character Per Line
Electrical Connectors
- Screw Typical Terminal Block
Enclosure, Body Material
- Aluminum
Environmental Protection
- Class 1, Div. 1, Groups B, C, D
- Class I, Div. 1, Groups A, B, C, D
- Class II, Div. 1, Groups E, F, G
- Class III, Div. 1, T4
- Explosion-proof
- Intrinsically Safe
- IP66
- NEMA 4X
Humidity
- 0 to 100 % Relative Humidity
Hysteresis
- ± 1 %
Output
- 4-20 mA, 2-Channels for Loop Power On RH
Power Requirement
- 16.5-28 Vdc
- 9.5-28 Vdc
Repeatability
- ± 0.1 % Typical
Resolution
- 0.1 % - RH
- 0.1° C
Response Time
- 15 seconds
Sensor / Probe Material
- Capacitance Polymer
Storage Temperature
- -40° to 80° C (-40° to 176° F)
Temperature Range
- -40° to 60° C (-40° to 140° F)
Thermal Drift
- < 1 % Relative Humidity/Year
- Process Monitoring
- Offshore HVAC Monitoring
- Dust and Grain Handling