Contact pressure gauges are pressure gauges with an integrated pressure switch. Depending on the pointer position of the indicating measuring instrument, switch contacts make or break circuits. This contact pressure gauge has a connection point located below the gauge and measures pressure from -1 to 0bar (-15 to 0psi). The scale division is 0.02 bar and the measurement accuracy class is 2.50 (±2.50% maximum deviation). The case is made of stainless steel and it has a G 1/2 inch brass connection port. It has an IP54 rating, and is suitable for a temperature range of -20 to 80 °C (-4 and 176 °F). This gauge has double contacts: contact No. 1 is normally closed (NC), and contact No. 2 is normally open (NO). This means that the 1st contact opens, and the 2nd contact closes when the respective setpoint value is exceeded. The recommended minimum difference between two contacts is 20% of the measuring span. The switch hysteresis is typically 2..5%. This version is a magnetic-snap action model with switch version S. Check the datasheet for the maximum switching power. Furthermore, for low voltages the load should never be below 20mA to guarantee good switching reliability.
A calibration certificate is not available.
Pros:
- Contact pressure gauges combine pressure switches with visual monitoring
- Switching capacity up to 250 V AC at 1 A
- Safety version with laminated safety glass, blow-out rear wall, and unbreakable partition wall (S 3 EN 837-1 / DIN 16006)
- High chemical resistance against the measured fluids thanks to the stainless steel (1.4404) connection point and measurement system
- Proven quality and reliability from WIKA
Cons:
- A calibration certificate is not available
Specifications
Measuring range : -1 to 0
Scale division [bar] : 0.02 bar
Accuracy class (EN) : 2.50 Pct.
Connection size : 1/2 inch
Connection type : Outer thread cylindrical BSPP-G
Material process connection : Brass
Pressure unit : bar
Cabinet diameter (mm) : 160
Liquid-damped : No
Manometer feature : Switching capacity 250 V AC / 1A
Contacts : 1st Normally closed 2nd Normally open
Cabinet material : Stainless steel 304 (1.4301)
Connection location : Below
Max. medium temperature (continuous) (°C) : 80
Max. ambient temperature (°C) : 60
Degree of protection (IP) : IP54
Pressure gauge attachment : Direct
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