Dwyer Omega – Series 1640 Differential Pressure Switch, Floating Contact, High/Low Actuation
Product Code: Series 1640
Manufacturer: Dwyer Omega
The unique electric switch design in the Series 1640 Floating Contact Null Switch for High and Low Actuation is another Dwyer Instruments, LLC innovation. The Dwyer® Model 1640 Differential Pressure Switch resembles the high precision large diaphragm Series 1630 switches. However, the Model 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. 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.
Compliance
CE
Electrical Connection
Screw Terminal
Materials, Wetted
Consult Factory
Media Compatibility
Air, Argon, Carbon dioxide, Helium, Nitrogen, Non-Corrosive Dry Gases
Mounting Orientation
Vertical Diaphragm
Operating Temperature, Max
110 °F
Operating Temperature, Min
-30 °F
Measurement Pressure Type
Differential
Process Connection Size
1/8 in
Process Connection Type
NPT Female
Proof Pressure
Up to 10 psi
Set Point Adjustment
Internal Screw
Switch Note
SPDT floating contact (not snap action), Non-inductive — 2.5A @ 110 VAC; 1.5 A @ 220 VAC; 1 A @ 24 VDC; 0.5 A @ 110 VAC; Inductive — 1 A @ 110 VAC; 0.5 A @ 220 VAC; 0.5 A @ 24 VDC (de-rate 70-80% for very slow pressure changes)
Switch Rating
Non-inductive: 2.5A @ 110 Vac, 1.5 A @ 220 Vac, 1 A @ 24 Vdc, 0.5 A @ 110 Vac; Inductive: 1 A @ 110 Vac, 0.5 A @ 220 Vac, 0.5 A @ 24 Vdc
Switch Type
SPDT NO/NC, Selectable
Weight
2.18 kg
