Model 231 Multi-Sense differential-pressure transducer

The Model 231 Multi-Sense differential-pressure transducer is suitable for monitoring control pump differential pressures, chiller or boiler differential pressure drops, and flow of gases or liquids. The transducer reduces inventory and installation costs by providing the user with field-selectable features such as switch-selectable pressure ranges, selectable analog outputs, and uni-directional and bi-directional spans. An optional LCD display is available for in situ reporting of range and output status. The Model 231 is offered in three versions, each with four unidirectional pressure ranges and four bidirectional pressure ranges. The MS1 has ranges from as low as ±5 psid to 50 psid; the MS2, from ±10 psid to 100 psid; and the MS3, from ±25 psid to 250 psid. All three versions feature a dual-sensor design that incorporates thin-film sensing technology for exceptional thermal accuracy and signal linearity. Each unit has been temperature-compensated from +32°F to +130°F, with zero and span accurate to within 0.02%/°F. Access to switches and jumpers is provided via an integral hinged cover. Jumpers provide additional features, such as port swapping, a selectable analog reverse mode, and a selectable-speed, slow-response mode for 5-s averaging or fast-response mode for a 1-s response. The Model 231 is compliant with the Restriction of Hazardous Substances (RoHS) directive.