Compact Low Differential Pressure Switches Series 1900

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Product information

Dwyer's Series 1900 is a compact low differential pressure switch designed to combine setpoint adjustability with outstanding reliability in HVAC and industrial automation applications.

✔ Optimized Design: Compact dimensions allow for easy installation in limited spaces of OEM equipment.

✔ Easy Adjustment: Setpoint adjustment screw is located inside the cover to prevent accidental changes.

✔ High Sensitivity: Silicone rubber diaphragm ensures precise response even at very low pressure ranges.

✔ Rugged Durability: Galvanized steel housing provides excellent strength and stable operation in various conditions.

✔ Versatile Application: Ideal for filter monitoring, fan control, and airflow status verification.

DOWNLOAD SERIES 1900 CATALOG (PDF)

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Technical characteristics
Name of the product
Standard technical document

Detailed Specifications

Brand	DWYER (USA)
Service	Air and non-combustible, compatible gases
Temperature Limits	-30 to 180°F (-34 to 82.2°C)
Pressure Limits	Operating pressure up to 45" w.c. (11.2 kPa)
Switch Type	Single-pole double-throw (SPDT)
Electrical Ratings	15A @ 120-480 VAC, 60 Hz
Process Connections	1/8" female NPT
Construction Materials	Silicone rubber diaphragm and galvanized steel housing

Series 1900 Model Selection Chart

Model Number	Operating Range (in w.c.)	Deadband at Min. Set Point	Deadband at Max. Set Point
1910-00	0.07 to 0.15	0.04	0.04
1910-0	0.15 to 0.5	0.10	0.10
1910-1	0.40 to 1.6	0.15	0.16
1910-5	1.40 to 5.5	0.30	0.30
1910-10	3.0 to 11.75	0.40	0.40
1910-20	4.0 to 20.0	0.40	0.50