Series 621 Pressure Indicator is a 1/8 DIN measuring and controlling instrument designed for positive, negative or differential pressures of air and compatible gases. Pressure readings are displayed on a large 3-1/2 digit LCD display which unit simultaneously produces a standard 4-20 mA output signal. Over a dozen stocked ranges are available from 0-3 in. w.c. to 0-100 psid or choose metric units in ranges from 0-0.75 kPa to 0-690 kPa. Circuit design enables use in 2-wire current loops.

SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±0.5% F.S. (includes linearity, hysteresis & repeatability.)
Stability: ±1% F.S./yr.
Temperature Limits: 0 to 140°F (-17.8 to 60°C).
Compensated Temperature Limits: 20 to 120°F (-6.67 to 48.9°C).
Pressure Limits: See chart on "Ordering" page.
Thermal Effect: 0.025% F.S./°F (0.045% F.S./°C).
Power Requirements: 10 to 35 VDC (2-wire).
Output Signal: 4 to 20 mA.
Zero and Span Adjustments: Accessible potentiometers.
Loop Resistance: DC; 0 to 1250 ohms max.
Current Consumption: DC; 38 mA max.
Electrical Connections: Terminal block.
Process Connections: Barbed for 1/8" (3.18 mm) I.D. tubing.
Enclosure Rating: Face designed to meet NEMA 4 (IP66).
Mounting Orientation: Not position sensitive.
Weight: 7.8 oz (221 g).
Agency Approvals: CE.