The Robertshaw® 2374-510 Air Pressure Sensing Switch has a glass-filled polycarbonate housing containing a sensing diaphragm and an integral snap-acting switch with three male 90° quick-connect terminals. The switch can sense positive, negative or differential air pressure. The field adjustable set point range of this switch is 0.10” WC to 10.0” WC. Using the switch accessories contained in this kit, the switch can be applied to a wide variety of residential and light commercial HVAC applications.

2374-510 Kit Contents
Air pressure sensing switch
Calibration springs (5 options)
Orifice flows (4 options)
Mounting brackets (2 options)
Calibration tool (hex wrench)

The Robertshaw® 2374 Series Adjustable Air Sensing Switches are designed to replace a wide variety of air sensing switches found in residential and light commercial applications including furnaces, electronic air cleaners and humidifiers. Two models are currently available with adjustable ranges. Both models are provided with an SPDT switch that can be actuated by positive or negative pressure or by pressure differential. Highly accurate, these switches are practically insensitive to temperature change with an operating temperature range of -40°F to 190°F (-40°C to 88°C). Each switch includes mounting hardware and an adjustment tool for easy installation and calibration.

Features and Benefits
Field adjustable control set point
Air sample line connectors will accept 1/8”, 1/4” or 3/8” tubing
Electrical connection is 1/4” spade
Vertical operating mounting position for diaphragm
UL File Number MH6213, CSA File Number LR18754

The Robertshaw® 2374 Series Adjustable Air Sensing Switches are designed to replace a wide variety of air sensing switches found in residential and light commercial applications including furnaces, electronic air cleaners and humidifiers. Two models are currently available with adjustable ranges. Both models are provided with an SPDT switch that can be actuated by positive or negative pressure or by pressure differential. Highly accurate, these switches are practically insensitive to temperature change with an operating temperature range of -40°F to 190°F (-40°C to 88°C). Each switch includes mounting hardware and an adjustment tool for easy installation and calibration.

Features and Benefits
Field adjustable control set point
Air sample line connectors will accept 1/8”, 1/4” or 3/8” tubing
Electrical connection is 1/4” spade
Vertical operating mounting position for diaphragm
UL File Number MH6213, CSA File Number LR18754

The Robertshaw® 2374 Series Adjustable Air Sensing Switches are designed to replace a wide variety of air sensing switches found in residential and light commercial applications including furnaces, electronic air cleaners and humidifiers. Two models are currently available with adjustable ranges. Both models are provided with an SPDT switch that can be actuated by positive or negative pressure or by pressure differential. Highly accurate, these switches are practically insensitive to temperature change with an operating temperature range of -40°F to 190°F (-40°C to 88°C). Each switch includes mounting hardware and an adjustment tool for easy installation and calibration.

Features and Benefits
Field adjustable control set point
Air sample line connectors will accept 1/8”, 1/4” or 3/8” tubing
Electrical connection is 1/4” spade
Vertical operating mounting position for diaphragm
UL File Number MH6213, CSA File Number LR18754

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45L female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Will not replace solenoids with internal metering orifices

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

Fan cycling low pressure switches

Features/Benefits

¼" SAE 45° female flare fitting with valve core depressor
Condenser fan cycling switch closes on pressure rise
Automatic Reset
Life at rated load: 100,000 cycles
Rated Voltage 24/120/240 VAC @ 50/60 Hz
Small size and light weight for direct mounting
Snap acting stainless steel hermetically sealed sensor
Wire is 18 AWG, 18" long

SWITCH, HIGH, PRES, 1/4 IN, 6VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, HIGH, PRES,1/4 IN, 6VDC, 12VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH,PRES,1/4 IN,6VDC,12VDC,36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in

SWITCH, PRES, 1/4 IN, 6VDC, 12VDC, 36VDC

1/4 in SAE 45 deg female flare fitting with valve core depressor
Automatic reset, high pressure switch opens on pressure rise
Life at rated load 100000 cycles
Small size and light weight for direct mounting, snap acting stainless steel hermetically sealed sensor, wire is 18 AWG, 18 in long
Frequency Rating 50/60 Hz
Nominal Size 1/4 in