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F Bamford & Co Ltd F Bamford (Engineering) Ltd F Bamford (Instruments) Ltd


The flow switch was designed by Frank Smith during the Second World War to protect large Mirrlees diesel engines from a loss of cooling water, and the manufacturing was subcontracted to F. Bamford & Co Ltd. In 1947 Frank Smith joined F. Bamford & Co Ltd, bringing with him the design rights of the flow switch, which he developed to suit a wider range of industries.


Other instruments were added to the portfolio with temperature, pressure and level devices designed and manufactured to the same rugged specification. A flameproof range was also designed to be used down coal mines and in petro-chemical installations, and the instrumentation division was a success. Therefore, in 1973 Frank Smith established F Bamford Instruments Ltd in its own right to continue production of this equipment.


  • Mechanical and electronic flowmeters.
  • Flow, temperature, pressure and level switches.
  • Flow indicators and sight glasses.
  • Exhaust gas temperature monitoring systems.
  • Fibre Optics shaft wear gauge.

Client Base

  • Marine.
  • Ministry of Defence.
  • Mining.
  • Petrochemical.
  • Power Generation.
  • Industrial.
  • Offshore.
  • Fire Protection.


F. Bamford Instruments is accredited to BS EN ISO 9001:2000  & EU Directive 94/9/EC (ATEX Directive) Cenelec EN 50014, EN5001B (Zones 1 & 2 Hazardous Areas).

F Bamford Instruments

Please visit our sub site for information relating to our Instrument operations:



Miniature Flowswitch


Level/Flow Switches


Cross Section Flow Switch