The Model 165 Series are low range differential pressure transducers and transmitters. Each unit features a stainless steel pressure sensor, a stainless steel enclosure and a plastic cover, which meets the NEMA 1 requirement. The electrical terminal screws and adjustment holes are concealed beneath a detachable plastic cap. All units are fully protected against short circuiting and incorrect wiring. The Model 165 Series are available for full scale pressure range from 0 to 0.1"WC till 0 to 100"WC. Both unidirectional and bidirectional pressure ranges are offered. The output of the Model 165 Pressure Transducer is available in two versions: 0 to 5VDC and 0 to 10VDC, where 0VDC is true zero without offset. The output of Model 165 Pressure Transmitter is 4 to 20 mA. All units are temperature compensated. The accuracy can be 0.6%, 0.4% or 0.25% at room temperature. The patented variable capacitance pressure sensor is constructed by stainless steel and glass, no glue or other organics. That provides excellent performance, corrosion resistance and long-term stability. Additionally, our unique production setup allows us to accommodate special orders for nonstandard pressure ranges (e.g. -0.5"WC to +3.5"WC). Standard Optional Optional 40 to 170° F(4 to 77°C) 15PSI(100kPa) 15PSI(100kPa) in Positive or Negative Direction for all Ranges ±0.5% FS/YR 5 seconds to meet specifications Each unit is calibrated in the vertical position. For best accuracy, adjust zero of the unit if it is mounted in other position. It is not necessary to adjust the sensitivity. * RSS of Non-Linearity, Hysteresis, and Non-Repeatability. 0 to 170°F (-18 to 77C) -40 to 185° F(-40 to 85°C) Terminal Strip 3/16” O.D. barbed brass for 1/8” I.D. push-on tubing Accessible under the small cap Typically air or similar non-conducting gases Stainless Steel and PC+ABS Alloy, 94V-0 Rated 5.8OZ/165g See Diagram 1 for outline and dimensions. alpha" instruments Applications: ■ HVAC and VAV Control ■ Clean Rooms and Isolation Rooms ■ Duct Static Pressure Measurement ■ Draft Control and Fume Hood Control ■ Furnace Air Flow Control ■ Power Plant Air Flow Monitor and Control Features • 15 PSI Over Pressure • Incorrect Wiring Protection • Nonstandard Pressure Ranges • True Zero Output for Voltage Unit • Meets C€ Conformance Standards • RoHS Compliant Performance Data Accuracy* (at room temp) Non-Linearity (BFSL) Hysteresis Non-Repeatability Thermal Effects: Zero/Span Shift (/°F) Compensated Range Maximum Line Pressure Overpressure Stability Warm-up Time Position Effect Operating Temperature Storage Temperature Electrical Termination Pressure Fittings Zero & Span Adjustment Pressure Media Enclosure Weight Installation Visit us Online: www.alphainstruments.com E-mail: [email protected] 978-264-29

Electrical Data (Voltage) Circuit 3-Wire (+EXC, -EXC, OUTPUT),Protected against incorrect wiring Output Impedance ^5.0 OHMS * Zero output: factory set at ±25mV(0-5VDC), ±50mV(0-10VDC) Span output: factory set at ±25mV(0-5VDC), ±50mV(0-10VDC) Calibrate with a 50K OHM load. Operable with a load greater than 5K OHM for 0-5VDC output, greater than 10K OHM for 0-10VDC output. Electrical Data (Current) Circuit Excitation Output** Bidirectional Output at Zero External Load 2-Wire(+EXC, -EXC), Protected against incorrect wiring 12-32VDC(see diagram 2 for maximum loop resistance) 4-20mA 12mA as standard...