Sangamo Choice Plus Electronic Room Thermostat Tamper Proof - Silver

The Sangamo Choice Plus is a wired electronic room thermostat with a tamper-resistant security cover secured by a Torx screw, preventing unauthorised temperature adjustment in shared spaces and public buildings. The thermostat uses an electronic sensor for responsive room temperature control and TPI (Time Proportional and Integral) logic to modulate heating output rather than switching on-off in wide swings, reducing fuel consumption and maintaining steadier room temperatures.

Designed for commercial, educational and residential care settings where tampering is a concern, the Choice Plus mounts on a standard UK back box and controls heating systems up to 10A load at 240V AC. The large central dial adjusts set temperature across a 5-30°C range, and the removable silver security cover prevents occupants from changing the setting once the dial is set by facilities staff. The 0.5°C or 1°C temperature swing adjustment allows fine-tuning of hysteresis to match the thermal mass of the building and radiator response time.

The silver finish sits neutrally in commercial corridors, office spaces and communal hallways without drawing attention. At 90mm wide and 92mm tall the thermostat fits a standard 25mm back box, and the cover projects approximately 46mm from the wall. The TPI control algorithm monitors temperature drift and adjusts boiler firing time proportionally, which reduces cycling wear on the boiler and maintains more stable temperatures than traditional bi-metallic thermostats.

Product Specification Sheet

Product Manual

What does the tamper-proof cover protect against?

The removable cover secures over the temperature dial with a security Torx screw, preventing occupants from adjusting the set temperature. This is useful in commercial buildings, care homes, student accommodation and other shared spaces where unauthorised temperature changes create heating cost issues or disputes between occupants.

What is TPI control?

TPI (Time Proportional and Integral) is a control algorithm that monitors temperature drift and adjusts boiler firing time proportionally rather than switching the heating fully on or off in wide swings. This maintains more stable room temperatures and reduces fuel consumption compared to traditional bi-metallic thermostats.

What back box depth is needed?

The thermostat fits a standard UK 25mm back box. The cover projects approximately 46mm from the wall when installed.

Can the temperature swing be adjusted?

Yes. The thermostat allows adjustment between 0.5°C and 1°C hysteresis (the temperature range before the thermostat switches the heating on or off). Lower hysteresis gives tighter temperature control but increases boiler cycling; higher hysteresis reduces cycling at the expense of slightly wider temperature variation.