Profile: Instrumentors Supply Inc. is a supplier of industrial heating supplies and process control devices such as PLCs & switches. Our products include electric heaters, process controls, sensors, power supplies, relays, transmitters and tachometers. We provide brands such as Carlo Gavazzi, Omron, Hanna, Dynapar and Eagle Signal. We offer open frame/covered power supplies, industrial power supplies and DIN mount power supplies. Our power supplies have features such as 3W to greater than 600W power rating, universal voltage ranges, under-voltage indicators and alarm output indicators. The pH controls are available with a selectable set-point for acid or basic dosage. They have an optional 4-20 mA analog output for recorder connection and power supply input at 115/230 Vac or 12 Vdc.