Dwyer

HHT Hazardous Area Humidity/Temperature Transmitter

FM approved explosion-proof and intrinsically safe models, replaceable calibrated sensor and integral LCD option

Starting At
$1,136.00 CAD
Normally ships in 3-4 Weeks

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The 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.

• FM approved explosion-proof and intrinsically safe models
• Integral LCD option
• Dual temperature and relative humidity output models

 

Relative Humidity Range 0 to 100% RH
Temperature Range -40 to 140F (-40 to 60C)
Accuracy 2% 10 to 90% RH, 0.9F at 72F (0.3C at 25C)
Hysteresis 1%
Repeatability 0.1% typical
Temperature Limits -40 to 140F (-40 to 60C)
Storage Temperature -40 to 176F (-40 to 80C)
Compensated Temperature -40 to 140F (-40 to 60C)
Power Requirements For instrinsically 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: 0.1F (0.1C)
Weight 2 lb 8 oz (1134 g)
Enclosure Rating NEMA 4X (IP66). Models 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; Models HHT-IX: FM Instrinsically 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 FM, CE

• Process monitoring
• Offshore HVAC monitoring
• Dust and grain handling