DWYER INSTRUMENTS 1950 Series Explosion-proof Differential Pressure Switches
Dwyer Instruments 1950 Series explosion-proof differential pressure switches monitor and control pressure differentials in hazardous environments with a risk of explosion. These switches are ideal for the oil & gas, chemical processing, mining and petrochemical industries.
Style | Model | Approx Deadband Max. Set Point | Approx Deadband Min. Set Point | Continious Pressure | Surge Pressure | Price | |
---|---|---|---|---|---|---|---|
A | 1950P-2-2F | 0.3 | 0.3 | 2.41 bar | 3.45 bar | €551.03 | |
A | 1950-5-2F | 0.4 | 0.3 | 0.11 bar | 0.69 bar | €420.76 | |
A | 1950-10-2F | 0.50 | 0.4 | 0.11 bar | 0.69 bar | €420.76 |
Working Mechanism
- Ensure that the gauge is mounted securely in a location free from excessive vibration & corrosion.
- Connect the pressure sources to the appropriate ports of the gauge using suitable tubing or piping.
- Confirm that the pressure sources are correctly connected to the high and low-pressure ports of the gauge. The high-pressure port typically connects to the source of greater pressure, while the low-pressure port connects to the source of lower pressure.
- Once the connections are established, apply pressure to the gauge system and observe the reading on the gauge display.
- The differential pressure is measured by observing the difference in pressure between the high and low-pressure ports.
- Take note of the unit of measurement displayed on the gauge and interpret the differential pressure reading accordingly.
Features
- These switches can operate within a temperature range of -40 to 140 degrees F.
- They have different enclosure ratings, including NEMA 3 (IP54), NEMA 7 and NEMA 9, offering superior protection in hazardous environments.
- They feature a single-pole double-throw (SPDT) switch configuration for common, normally open and normally closed contacts, ensuring a secure and reliable electrical connection.
- These switches have 1/8-inch female NPT process connections and can be easily integrated into the pressure system being monitored.
- They feature a screw-type set point adjustment mechanism located on the top of the housing, allowing for easy and precise adjustment of the pressure set point.
Standards and Approvals
- CE
- CSA
- UL
- FM
Frequently Asked Questions
How to install these Dwyer differential pressure switches?
- Select a location that is free from excess vibration and corrosive atmospheres.
- Mount the standard switches with the diaphragm positioned in a vertical plane.
- Make sure that the switch lettering and nameplate are upright.
- Connect the switch to the source of pressure, vacuum or differential pressure.
- Join the tubing to the two 1/8-inch female NPT pressure ports.
- Connect pipes or tubes from the source of greater pressure to the high-pressure port marked HIGH PRESS and from the source of lower pressure to the low-pressure port marked LOW PRESS.
How to change the set point of these differential pressure switches?
- Remove the plastic cap located at the top of the housing by carefully pulling it off.
- Locate the slotted adjustment screw underneath the plastic cap. This screw is used to change the set point pressure of the switch.
- To increase the set point pressure, turn the screw clockwise (to the right). To decrease the set point pressure, turn the screw counterclockwise (to the left).
- Make adjustments to the set point slowly and carefully to ensure accurate calibration.
What is the difference between a differential pressure gauge and a pressure gauge?
A differential pressure gauge measures the difference in pressure between two points, whereas a standard pressure gauge measures the pressure at a single point in a system. Differential pressure gauges are used to monitor pressure differentials, while pressure gauges are used to measure absolute or gauge pressures.
How do I select the right differential pressure gauge for my application?
When selecting a differential pressure gauge, consider factors like the pressure range, accuracy requirements, environmental conditions and compatibility with the measured media.
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