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 $1,304.15

Ordering

Grouped product items
Model	Description	Availability*	Price
HHT-EU	Explosion-proof humidity transmitter.	1-3 days*	$1,714.95
HHT-EU-LCD	Explosion-proof humidity transmitter with LCD display.	1-3 days*	$1,827.25
HHT-IT	Intrinsically safe humidity/temperature transmitter.	1-3 days*	$1,364.45
HHT-IT-LCD	Intrinsically safe humidity/temperature transmitter with LCD display.	1-3 days*	$1,476.75
HHT-IU	Intrinsically safe humidity transmitter.	1-3 days*	$1,304.15

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

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

Support Library

Product Literature

Manuals

Instruction Manual

Catalog Pages

Series HHT Catalog Page

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

Write Your Own Review

Only registered users can write reviews. Please Sign in or create an account

Accessories

Model	Description	Availability*	Price
A-287	Mounting bracket for pipe or surface mounting (includes bracket and two 2" U-bolts)	1-3 days*	$59.85
A-450	Replacement sintered filter for Series HHT	1-3 days*	$10.85
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*	$726.25