Series HHT Hazardous Area Humidity/Temperature Transmitter

Intrinsically Safe or Explosion-Proof Models

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.

Product Applications

Process monitoring
Offshore HVAC monitoring
Dust and grain handling

Starting at $1,389.00

Ordering

Grouped product items
Model	Description	Availability*	Price
HHT-EU	Explosion-proof humidity transmitter.	1-3 days*	$1,827.00
HHT-EU-LCD	Explosion-proof humidity transmitter with LCD display.	1-3 days*	$1,947.00
HHT-IT	Intrinsically safe humidity/temperature transmitter.	1-3 days*	$1,453.50
HHT-IT-LCD	Intrinsically safe humidity/temperature transmitter with LCD display.	1-3 days*	$1,573.50
HHT-IU	Intrinsically safe humidity transmitter.	1-3 days*	$1,389.00

Specifications

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 s.
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 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 Intrinsically Safe, Class I Div. 1 Group A, B, C, D, Class II Div. 1 Group E, F, G, Class III Div. 1 T4.
Compliance:: FM, CE.

Features

Support Library

Approvals

Drawings

Model Chart

EXAMPLE	HHT	I	T	LCD	Series HHT-IT-LCD Humidity/Temperature Transmitter, FM intrinsically safe, 1/2" male NPT humidity/temperature with LCD Display
SERIES	HHT				HUMIDITY/TEMP TRANSMITTER
APPROVAL		A E I			ATEX/IECEx FLAMEPROOF (N/A) FM EXPLOSION PROOF FM INTRINSICALLY SAFE
PROCESS CONNECTION AND OUTPUTS			B E T U		1/2" MALE BSPT HUMIDITY 1/2" MALE BSPT HUMIDITY/TEMP (I ONLY) 1/2" MALE NPT HUMIDITY/TEMP (I ONLY) 1/2" MALE NPT HUMIDITY
OPTION				C5 LCD M20 FC	C5-M HOUSING PAINT SPECIFICATION LCD DISPLAY M20 CONDUIT HOUSING FACTORY CALIBRATION CERTIFICATE

Reviews

Accessories

Model	Description	Availability*	Price
A-287	Mounting bracket for pipe or surface mounting (includes bracket and two 2" U-bolts)	1-3 days*	$64.00
A-450	Replacement sintered filter for Series HHT	1-3 days*	$11.75
A-451	Replacement 2% sensor for Series HHT (for models built after April 2019).	1-3 days*	$105.00
KFD0-SCS-EX1.55	Loop powered galvanic barrier for use with intrinsically safe transmitters.	1-3 days*	$843.35

Series TTE Explosion-Proof RTD Temperature Transmitter

Series TTW Weatherproof Immersion Temperature Transmitter

Series HHT Hazardous Area Humidity/Temperature Transmitter

Product Applications

Specifications

Features

Product Literature

Manuals

Catalog Pages

Approvals

Drawings

Model Chart