THL Direct Mount Freeze Protection Thermostats

Heat Trace Freeze Protection Thermostat
Tools Icon svg image 48 height by 48 width
Low Maintenance

Rugged and durable design means intervention is rarely required.

About the Product

THL: NEMA 4X Ambient Air Sensing

Maintaining proper viscosity and flow is critical in heat trace or freeze protection applications. The THR remote mount thermostats utilize a stainless steel bulb and capillary design to accurately sense temperature at key points along a pipe. The THL direct mount thermostats feature liquid-filled thermal assemblies and sense air temperatures from 15 to 140˚F. Both models are epoxy coated to seal from moisture and contaminants in compliance with NEMA 4X requirements. NEMA 7 stats TXR and TXL are designed for Class I, Division I and 2, Groups B, C, D, and Class 2, Division I and 2, Group E, F, G.

WARNING: Hazard of Fire. These devices function as temperature controls only. Because they do not fail-safe, an approved temperature and/or pressure safety control must be used for safe operation.

THL Heat Trace Freeze Protection Thermostats

+  Direct Mount for Freeze Protection (Ambient)
+  22 Amp Resistive Switch
+  Single and Dual Output Models
+  ± 1% Setpoint Repeatability
+  Fast Response for Protection of Valves and Piping
+  NEMA 4X, 7 and 9 Enclosures
+  Third-party certifications: UL Listed, CSA, ATEX


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Chromalox heat trace solutions offer a safe, reliable and efficient way for freeze protection and process maintenance of pipes, valves, and tanks in the most extreme conditions.