Dwyer 1640 Series Floating Contact Null Switches for High and Low Actuation

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Dwyer 1640 Series Floating Contact Null Switches for High and Low Actuation

Model Selection

Dwyer 1640-0 Differential Pressure Switch (.01-0.2"w.c.) with SPDT switch
1640-0	$1,280.61 CAD Was: $1,377.00	Availability: 15+ Weeks
Dwyer 1640-1 Differential Pressure Switch (0.2-1.0"w.c.) with SPDT switch
1640-1	$1,280.61 CAD Was: $1,377.00	Availability: 3 to 4 Weeks
Dwyer 1640-10 Differential Pressure Switch (3.0-12.0"w.c.) with SPDT switch
1640-10	$1,280.61 CAD Was: $1,377.00	Availability: 2 to 3 Weeks
Dwyer 1640-2 Differential Pressure Switch (1.0-4.0"w.c.) with SPDT switch
1640-2	$1,280.61 CAD Was: $1,377.00	Availability: 2 to 3 Weeks
Dwyer 1640-5 Differential Pressure Switch (2.0-6.0"w.c.) with SPDT switch
1640-5	$1,280.61 CAD Was: $1,377.00	Availability: 2 to 3 Weeks

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Model Selection

The 1640 is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch. As the diaphragm moves in response to pressure changes, it moves the floating contact to cause switching action at two preset points with no switching action between these points.

Dwyer 1640-0 Differential Pressure Switch (.01-0.2"w.c.) with SPDT switch
1640-0	$1,280.61 CAD Was: $1,377.00	Availability: 15+ Weeks
Dwyer 1640-1 Differential Pressure Switch (0.2-1.0"w.c.) with SPDT switch
1640-1	$1,280.61 CAD Was: $1,377.00	Availability: 3 to 4 Weeks
Dwyer 1640-10 Differential Pressure Switch (3.0-12.0"w.c.) with SPDT switch
1640-10	$1,280.61 CAD Was: $1,377.00	Availability: 2 to 3 Weeks
Dwyer 1640-2 Differential Pressure Switch (1.0-4.0"w.c.) with SPDT switch
1640-2	$1,280.61 CAD Was: $1,377.00	Availability: 2 to 3 Weeks
Dwyer 1640-5 Differential Pressure Switch (2.0-6.0"w.c.) with SPDT switch
1640-5	$1,280.61 CAD Was: $1,377.00	Availability: 2 to 3 Weeks

Dwyer 1640 Series Offers

Features

As the diaphragm moves in response to pressure changes, it moves the floating contact to cause switching action at two preset points with no switching action between these points
The "high" circuit will be closed when rising pressure differential reaches the preset level
The "low" circuit will be closed when falling pressure differential reaches the preset level
A typical example of usage is to position motorized dampers when static pressure in a duct system reaches a desired maximum and reposition the dampers when the static pressure falls to a pre-established minimum
Can serve in the same way to control air velocity and maintain a constant volume of air in a supply duct
CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES

Dwyer 1640 Series Specifications

Service	Air and non-combustible, compatible gases
Temperature Limits	-30 to 110°F (-34.4 to 43.3°C)
Pressure Limits	10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge
Switch Type	Single-pole double throw (SPDT) floating contact (not snap action)
Process Connections	⅛" (0.3175 cm) NPT
Electrical Rating	Non-inductive: 2.5 A at 110 V AC, 1.5 A at 220 V AC, 1 A at 24 V DC, 0.5 A at 110 V AC Inductive: 1 A at 110 V AC, 0.5 A at 220 V AC, 0.5 A at 24 V DC (De-rate 70 to 80% for very slow pressure changes)
Connections	Electrical: 3 screw type, common, normally open and normally closed Process: ⅛" female NPT
Mounting Orientation	Diaphragm in vertical position
Set Point Adjustment	Screw type
Agency Approvals	CE
Weight	4 lbs (2.18 kg)

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Dwyer 1640 Series Floating Contact Null Switches for High and Low Actuation

datasheet for the Dwyer 1640 Series Floating Contact Null Switches for High and Low Actuation manual for the Dwyer 1640 Series Floating Contact Null Switches for High and Low Actuation

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Description ➕➖

Dwyer 1640 Series Offers

Features

As the diaphragm moves in response to pressure changes, it moves the floating contact to cause switching action at two preset points with no switching action between these points
The "high" circuit will be closed when rising pressure differential reaches the preset level
The "low" circuit will be closed when falling pressure differential reaches the preset level
A typical example of usage is to position motorized dampers when static pressure in a duct system reaches a desired maximum and reposition the dampers when the static pressure falls to a pre-established minimum
Can serve in the same way to control air velocity and maintain a constant volume of air in a supply duct
CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES

Specifications ➕➖

Dwyer 1640 Series Specifications

Service	Air and non-combustible, compatible gases
Temperature Limits	-30 to 110°F (-34.4 to 43.3°C)
Pressure Limits	10 psig (68.95 kPa) continuous, 25 psig (172.4 kPa) surge
Switch Type	Single-pole double throw (SPDT) floating contact (not snap action)
Process Connections	⅛" (0.3175 cm) NPT
Electrical Rating	Non-inductive: 2.5 A at 110 V AC, 1.5 A at 220 V AC, 1 A at 24 V DC, 0.5 A at 110 V AC Inductive: 1 A at 110 V AC, 0.5 A at 220 V AC, 0.5 A at 24 V DC (De-rate 70 to 80% for very slow pressure changes)
Connections	Electrical: 3 screw type, common, normally open and normally closed Process: ⅛" female NPT
Mounting Orientation	Diaphragm in vertical position
Set Point Adjustment	Screw type
Agency Approvals	CE
Weight	4 lbs (2.18 kg)