Our name
Σ, the sign for a sum total
Sigma draws its inspiration from Σ, the 18th letter of the Greek alphabet, which mathematicians use to denote the algebraic sum total.
The name sums up our purpose: to serve industry by recognising and providing a sum total of fluid monitoring devices and allied instrumentation products. That is why our range runs from level gauges and tank level indicators to level and flow switches, transmitters, sight flow indicators, manifolds, valves and fittings.
Our products are recognised by leading domestic and international companies, consultants and end users, and the repeat orders we receive are the clearest measure of the confidence they place in us.




