CAPSTAT Capillary Thermostat CT
Temperature control of Heat Trace circuits in SAFE areas only.
- Three wide span temperature ranges.
- Stainless steel sensor and capillary tube.
- Optional stainless steel armoured capillary.
- Optional over-temperature lock-out.

Features
- Capstats are temperature adjustable ON-OFF thermostats comprising a liquid filled sensing bulb connected to an electrical contactor switch, via a capillary tube.
- Expansion of the liquid on rise in temperature causes the contactor switch to open, removing power from the heating circuit. As a liquid cools, the switch closes, energising the heater(s).
- Capstats may control surface temperatures such as pipes or vessels. Alternatively, the sensing bulb may be positioned to sense the air temperature.
- Capstats may be used to provide process temperature control in safe areas, by switching the heating circuits at the desired temperature.
- The addition of a high limit cut-out switch (as provided with the Capstat-Dual version) is specified when the heat tracing scheme will not stabilise at a safe temperature without process control. The high limit cut-out switch will operate if the process control switch fails, or if an unsafe process temperature occurs.
Options
- CT - Capstat for use in safe areas.
- CT../X - Optional armoured capillary provides additional mechanical protection for the capillary tube(s).
- CT..DUAL - Over-temperature lock-out (20°- 300°C). Factory preset - over-temperature setting
must be supplied with the purchase order.
NOTE:
For certified hazardous areas, CT-FL Capstats are available
(see separate datasheet).
Product examples
