Skip to content

PROSTAT4 Two-Temperature Tamper-Resistant Industrial Thermostat

Tamper proof thermostat
  • Industrial heater control where two temperature settings are required
    (e.g. comfort and frost-protection settings)
  • Run-down timer
  • Tamper resistant
  • Integral ‘black bulb’ sensor
  • IP65 Ingress protection

Range & Price

The prices shown are list prices and perfectly safe to use for budget purposes. Contact your electrical wholesaler for final prices.

Model Description

List Price

Prostat4 Front web PROSTAT4 Two-Temperature Tamper-Resistant Industrial Thermostat


CXS Optional remote temperature sensor CXS Remote-mounted air sensor (optional)


CXS Optional remote temperature sensor CXSIP Remote-mounted air sensor IP65 (optional)


BBS Black Box Sensor BBS Remote-mounted black bulb sensor (optional)


Hard Case HC-S2 optional remote sensor BBSIP Remote-mounted black bulb IP65 sensor (optional)


Technical Specification

Adjustable Range – Setting One (Default)

0°C to +20°C

Adjustable Range – Setting Two

10°C to +30°C


Surface mount

Switching Capacity

32A 230V

Voltage Supply



Single pole, single throw


140mm (H) x 124mm (W) x 78mm (D)

Ingress protection



Integral ‘black bulb’

Three methods to select Temperature Setting Two

1 – Push button on front face of thermostat activates built-in run-down timer

2 – Remote-mounted push button (CS-5) activates built-in run-down timer

3 – Remote-mounted volt-free programmable timer (PROTIM-7)

Special features

Can be use with remote-mounted temperature sensor BBS (black bulb standard) BBSIP (black bulb IP65)  CXS (standard air sensor) or CXSIP (air sensor IP65)

Optional open window detection

Supplied with 2 x M20 cable glands