Tempatron 1/16 DIN On/Off Temperature Controller, 48 x 48mm, 1 Output Relay, 110 → 230 V ac Supply Voltage

LED status and supply indication
Use any suitable 50-0-50μA meter for deviation readings
PD types have 'over temperature', 'in-band' and 'under temperature' LED's
Plugs into relay base (stock no. 402-721)
Supplied with hex key to lock temperature setting
Dimensions: H48 x W48 x D100mm (incl. knob)

Analogue

These temperature controllers have an operating voltage range of 110/240V a.c., an ambient temperature range of -10 to+50°C, and LED status and supply indication. The panel cut out dimensions are 45 x 45mm