Series A1 - A4 Digital Differential Pressure Gauge
	Quantity in Basket: None Code: SEA1-4 Price: $95.00 Shipping Weight: 1.00 pounds
	Model - Display & Control: A-1 LED Display A2 - LED Display with Process Arch (Add $30) A3 - LED Display with Process Arch and LCD + Relays (Add $150) A4 - LED Display with Process Arch and OLCD + Relays (Add $210) Transmitter Option: Without Transmitter 4-20mA Transmitter (Add $60) Accuracy: 1% Accuracy 0.50% Accuracy (Add $50) 0.25% Accuracy (Add $100) Select Range: 0 - 0.5" WC 0 - 1" WC 0 - 2" WC 0 - 3" WC 0 - 4" WC 0 - 5" WC 0 - 8" WC 0 - 10" WC 0 - 15" WC 0 -20" WC 0 - 30" WC   Weather Proof Cover (Add $15)   Liquid Tight PG-21 Cable Connector for 0.34-0.63" dia. cable (Add $9)   90° Rubber Fitting for 3/16"ID push on tubing (Add $5)   Opti-Link Universal Programming Key (Add $50)   Opti-Link Keypad lock/unlock Key (Add $50)
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The Series A family of products all have digital indication for monitoring differential pressure. The A1 and A2 give indication with 5 different selectable engineering units for pressure. The difference between the two products is the addition of the "Process Arch" on the A2 which is designed to mimic the movement of an indicating needle in mechanical differential pressure gauges. The A3 and A4 add additional programming features such as peak and valley indication, 14 selectable engineering units and the ability to function as a flow gauge when used with an airflow sensing device such as a pitot tube by reading directly in air velocity or flow. The difference between the two is the programming display, the A3 uses a LCD and the A4 uses a much brighter easier to read OLED. A-1 Digital Differential Pressure Gauge LED Display Options: 0.5% and 0.25% Accuracy 4 to 20 mA Output A-2 Digital Differential Pressure Gauge LED Display and Process Arch Indicator Options: 0.5% and 0.25% Accuracy 4 to 20 mA Output DATA SHEET / INSTALLATION MANUAL / DRAWING 1 / DRAWING 2 DATA SHEET / INSTALLATION MANUAL / DRAWING 1 / DRAWING 2     A-3 Digital Differential Pressure Gauge LED Display and Process Arch Indicator LCD programming display Options: 0.5% and 0.25% Accuracy 4 to 20 mA Output 2 SPDT Control Relays A-4 Digital Differential Pressure Gauge LED Display and Process Arch Indicator OLCD programming display Options: 0.5% and 0.25% Accuracy 4 to 20 mA Output 2 SPDT Control Relays DATA SHEET / INSTALLATION MANUAL DRAWING 1 / DRAWING 2 DATA SHEET / INSTALLATION MANUAL / DRAWING 1 / DRAWING 2   SPECIFICATIONS 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% Temperature Ranges (Compensated and Operating): -10° to 140°F (-23° to 60°C) Thermal Effect*: +/- 0.012% FS/°F Output Signal: 4-20 mA (option) Loop Resistance: 750 Max (for internally sourced power) 1800 Max (for externally sourced power of 36 VDC) Power Supply: Universal 16-265 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: A1 - 4 Digit, red LED, ½" digits   A2 - 4 Digit, red LED, ½" digits ; Process Arch   A3 - 4 Digit, red LED, ½" digits ; Process Arch ; LCD programming display   A4 - 4 Digit, red LED, ½" digits ; Process Arch ;OLCD programming display Relays on Series A3 and A4: (2) SPDT 8 Amps @ 250 VAC, 5A @30 VDC Process Connection: Push on connection for 3/16" tubing Agency Approvals: Pending - UL, C-UL, CE *Custom calibration including improved accuracy and thermal effect are available.