Hazardous Area Temperature Controller – DTS-HAZ

DTS-HAZ Heat Trace Digital Thermostat 

  • 30 Amp Solid State Relay (SSR) Output
  • On/Off Control With Programmable Deadband As Low As 2 deg.F
  • Soft Start Feature Eliminates SR Cable In-Rush
  • LED Indication for:
    • Setpoint Temperature
    • Process Temperature
    • High Temperature Alarm
    • Low Temperature Alarm
    • RTD Failure
  • Programmable High & Low Temperature Alarms
  • Common Alarm Contact for Remote Indication of Alarm Status
  • NEMA 4X Enclosure
  • Integral Pipe Stand
  • 100 Ohm Platinum RTD – Included
  • Enclosure Serves as Heating Cable, A/C Power & Sensor Connection
  • Works with SR, CWM and MI Cable
  • 100 to 277 VAC Operation
DTS-HAZ Heat Trace Digital Thermostat

Product Description:

The DTS-HAZ digital thermostat is a microprocessor-based temperature control and power connection kit. It is used for freeze protection or process temperature maintenance of pipes or tanks protected by heat tracing products. This thermostat can be used with Constant Wattage, Mineral Insulated, or Self-Regulating heating cables in Ordinary area or Class 1, Division 2 hazardous area locations.

This unit is designed to provide local temperature control and monitoring for heat-traced pipes or tanks across various industries and applications and will switch 30 amperes of current.

The DTS-HAZ provides easy programming of the temperature set point, high and low temperature alarms, the deadband, the temperature units, the soft start function, and the alarm state through the front panel push buttons. LED lights are provided for indication of power to the unit, heater power on (load), and alarm status. A Fail-Safe alarm contact is included for wiring to your building management system to indicate alarm status.


  • Freeze Protection of Piping
  • Process Temperature Maintenance
  • Tank Freeze Protection
  • Tank Process Temperature Maintenance


  • Ordinary Areas
  • Hazardous Areas, Class 1, Div 2, Groups A,B,C,D

Sensor Details:

  • 100 Ohm Platinum RTD
  • Probe Length = 4″
  • Probe Diameter = 1/4″
  • Leadwire Length = 3ft (Note: The maximum allowable length of the RTD wire is 50ft to remain UL/cUL compliant.)


  • Operating Voltage: 100 to 277 VAC, 50/60Hz, Single Phase
  • Operating Temperature:
    • Hazardous Areas: -40°F to 104°F (-40°C to 40°C)
    • Ordinary Areas: -40°F to 140°F (-40°C to 60°C)
  • Input: 100 Ohm platinum RTD
  • Output: 30 amp solid state relay
  • Alarms: High temp to 1150°F (621°C), Low temp to -80°F (-62°C), RTD Failure
  • Common Alarm Contact Rating: 12-277 VAC, 2Amps RMS
  • Deadband: 1°F (or C) to 100°F (or C), programmable
  • Set Point: -80°F to 1100°F programmable (-62°C to 593°C)
  • Units of Temperature: °F or °C, selectable
  • Control Mode: On/Off control
  • Soft Start: User selectable integral soft start, which eliminates nuisance breaker tripping associated with self-regulating cable in-rush
CHR DTS-HAZ C1D2 Temperature Controller


  • User Selectable Soft-Start Program
  • Small Enclosure: The 6.25-inch by 6.25-inch enclosure houses the temperature control and monitoring unit along with terminals for connecting instrument power, heating cable, and RTD.
  • 100 Ohm platinum RTD: Can be pipe mounted or used to sense ambient air temperature.
  • Pipe stand-off mount: Allows for direct pipe mounting.
  • Integral wiring: The wiring of the heating cable, AC power line, and the RTD sensor are all accomplished within the enclosure. This feature reduces both labor and material costs by eliminating the need for an additional heat trace power connection kit and the time required for the additional wiring.
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