These transducer probes are specially designed to be used in supermarket refrigeration systems, where they can be inserted directly into vertical and horizontal high pressure refrigerant receivers or to monitor refrigerant in suction accumulators. They warn of extremely high or low levels of refrigerant levels, including R22, R134a, R404A, R507 as well as refrigerant oils and secondary coolants. The probes come factory pre-calibrated and tested. They give a computer-compatible zero to five or one to six VDC output signal in proportion to the liquid level. The probes are available with NPT or optional Rotalock connections. Special models are also available for OEM requirements.

Hansen Technologies Corp., 6827 High Grove Blvd., Burr Ridge, IL 60521; 800/426-7368.