Vinyl Sign Supplies, 122 Pacific Dr, Quakertown, PA 18951, US

Sigma Controls develops process control instrumentation for the water and wastewater markets. The company manufactures advanced instrumentation for the measurement and control of pressure, level and flow applications. Its capabilities include constant and variable speed pump controls, telemetry and SCADA systems, alarm and monitoring panels, human machine interface software and microprocessor based controllers. Sigma provides level measurement components, sensors, probes, multifloat switches and submersible level transmitters. The company also supplies Infilink graphical software. Sigma Controls was founded in 1985 and operates a 10,000-square-foot facility in Perkasie, Pa.