New Products

Din Rail Power Meter Set Point Relay2
Din Rail Power
Meter + Set Point Relay
4 20ma
Current Sensors
4-20mA/10V DC output
3phase Ct +
power meter + RS485

View our UK manufacturing plant

Howard Butler LTD is a UK manufacturer of instrumentation & control products such as current transformers, digital and analogue meters and protection relays. Howard Butler Ltd exports worldwide. We have been manufacturing in the UK since 1915 and employ over 100 people. View our manufacturing plant below.