The Series A1 Digital Differential Pressure Gauge is a patent pending microprocessor based digital pressure gage for positive, negative, and differential measurement designed to be a direct replacement for mechanical gauges. The Series A1 digital differential pressure gauges utilize an extremely stable piezoresistive sensing technology to give a standard full scale accuracy of 1%. For applications requiring better accuracy, the A1 is also available with 0.5% or 0.25% accuracy. The A1 pressure gauge also has an optional 4-20 mA output for applications requiring an output signal. The A1 features a bright ½” LED display, which gives the gauge improved readability and precision. The A1 digital differential pressure gauges also feature 5 user selectable engineering units including in. w.c., mm w.c., cm w.c., kPa, and Pa. The Series A1 offers an improved look, and performance compared to mechanical gauges.
Maximum Pressure: 4″ w.c. and less = 2 PSI; 5″ w.c. and above = 10 PSI
Media compatibility: Air and compatible non combustible, non corrosive gasses
Accuracy*: Axxx0-xx – 1.00%; Axxx1-xx – 0.50%; Axxx2-xx – 0.25%
Temperature Ranges: Compensated and Operating: -10° to 140°F (-23° to 60°C)
Thermal Effect*: +/- 0.02% FS/°F
Output Signal: 4-20 mA (option)
Loop Resistance: 750 Ω Max (for internally sourced power); 1800 Ω Max (for externally sourced power of 36 VDC)
Power Supply: Universal 24-240 VAC or VDC
Housing Material: Glass Filled Nylon
Enclosure Rating: Designed to meet NEMA 4X face; with optional cover the entire product is weatherproof
Electrical Connections: screw terminals
Response Time: <100 ms
Display: 4 Digit, red LED, ½” digits
Process Connection: Push on connection for 3/16″ tubing
Agency Approvals: ETL, CE
* Custom calibration including improved accuracy and thermal effect are available.