Dwyer Instruments Mercoid Control DA-31-156-6 Bourdon Tube Pressure Switch 120/240V 10-100PSI -NIB

Dwyer Instruments Mercoid Control DA-31-156-6
Bourdon Tube Pressure Switch

Voltage: 120/240V

Pressure Range: 10–100 PSI

Condition: New in Box (NIB)
Key Features:
Adjustable Deadband:

Lets you set high and low-pressure switch points separately over the full scale for precise control.
Adjustable Deadband:

Lets you set high and low-pressure switch points separately over the full scale for precise control.
Visible Dial:

A clear, calibrated dial shows the pressure range and switch actuation—easy to monitor and adjust.
Visible Dial:

A clear, calibrated dial shows the pressure range and switch actuation—easy to monitor and adjust.
Switch Options:

Typically uses a snap-action switch, though Mercoid also offers mercury switch versions for specific uses.
Switch Options:

Typically uses a snap-action switch, though Mercoid also offers mercury switch versions for specific uses.
Broad Pressure Range Capability:

Handles pressure from full vacuum to 5,000 PSI depending on the exact model.
Broad Pressure Range Capability:

Handles pressure from full vacuum to 5,000 PSI depending on the exact model.
Durable Housing:

Pressed steel construction with a transparent cover for durability and visibility.
Durable Housing:

Pressed steel construction with a transparent cover for durability and visibility.
Specifications:
Temperature Rating:

Operates up to 180°F. For higher temps, use a pigtail siphon or remote mount.
Temperature Rating:

Operates up to 180°F. For higher temps, use a pigtail siphon or remote mount.
Pressure Connection:

Standard 1/4″ NPT connection (1/2″ NPT for some ranges).
Pressure Connection:

Standard 1/4″ NPT connection (1/2″ NPT for some ranges).
Wiring:

Screw-type terminals for easy installation (typically SPDT configuration).
Wiring:

Screw-type terminals for easy installation (typically SPDT configuration).
Wetted Parts:

Materials are compatible with brass Bourdon tubes—resistant to corrosion for many fluid types.
Wetted Parts:

Materials are compatible with brass Bourdon tubes—resistant to corrosion for many fluid types.
Weight:

Roughly 4 lbs for the standard model. Heavier versions exist for weatherproof/explosion-proof options.
Weight:

Roughly 4 lbs for the standard model. Heavier versions exist for weatherproof/explosion-proof options.
Model Breakdown:
DA:

Series with adjustable deadband and dual external pressure setpoint adjustments.
DA:

Series with adjustable deadband and dual external pressure setpoint adjustments.
31:

Refers to brass Bourdon tube with a snap-action switch.
31:

Refers to brass Bourdon tube with a snap-action switch.
156-6:

Indicates a pressure range of 10–100 PSI, SPDT switching action.
156-6:

Indicates a pressure range of 10–100 PSI, SPDT switching action.

Weight: 8 lbs
Dimensions: 13 × 13 × 8 in