D.P.Engineers

Application	Air Conditioning Refrigeration Coil Icing Detection; Defrost Cycle Initiation
Brand	Dwyer
Electrical Connection	3 Screw Connections
Automation Grade	Automatic
Temperature Limits	-30 to 180 DegreeF (-34 to 82.2 DegreeC)
Humidity Limit	80% RH
Switch Type	SPDT
Electrical Ratings	120 - 480 VDC

Dwyer Series 1900 Compact Low Differential Pressure Switches

For air and non-combustible compatible gases, Series 1900 switches have set points from 0.07 to 20" w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure and prevents tampering. UL, CE and CSA listed, and FM approved.

Dwyer 1900 Series Offers

Features

• Oversized check valves for smooth controlled operation
• Mash proof vent valve (no needle valve)
• Patented non-oil based lubricants used on all moving parts
• Dual O-rings on all pistons to ensure zero leakage

Applications

• Air conditioning refrigeration coil icing detection; defrost cycle initiation
• Clogged filter detection
• Variable air volume controller

Application	Air Conditioning Refrigeration Coil Icing Detection; Defrost Cycle Initiation
Brand	DwyerSA
Power	120 - 277 VAC
Pressure Range	0.15 - 0.55" W.C
Temprature	-30 to 180 DegreeF
Frequency	60 Hz

Minimum order quantity: 5 Piece

Dwyer Series 1910-0 Compact Low Differential Pressure Switch.

Range 0.15 - 0.55" W.C.

The Dwyer 1910-0 Compact Low Differential Pressure Switch combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. For air and non-combustible compatible gases, 19100 switches have set points from 0.15 - 0.55" w.c.. Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering. UL, CE and CSA listed, and FM approved.

• Range: 0.15 - 0.55" W.C.
• Flame-proof ATEX enclosure protects the device in hazardous areas
• Compact size and repeatability, provides a high-value switch for many industrial and OEM applications
• Range screw protected inside switch enclosure prevents tampering
• No power to operate DPDT switch means no additional wiring or conduit reduces material and installation labor costs
• Easy access for modifying set point simplifies adjustment
• Both control contacts activate at the same time eliminating system issues where lead switch activities preventing the lagging switch from sending a signal.

Brand	Dwyer
Media Type	Air And All Compatible Gases
Contact System Type	SPDT
Electrical Connection	Screw Terminals
Contact Material	Gold
Pressure range	0.40-1.6" WC
Usage/Application	Air Conditioning Refrigeration Coil Icing Detection; Defrost Cycle Initiation

Minimum order quantity: 5 Piece

Dwyer Series 1900-1 Compact Low Differential Pressure Switch Range 0.40-1.6" W.C

Range 0.40-1.6" W.C.
DESCRIPTION

Most popular SERIES 1900 combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. Series 1900 switches have set points from 0.07 to 20" w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering.

• Compact size and repeatability, provides a high-value switch for many industrial and OEM applications.

• Range screw protected inside enclosure provides simplifies making adjustments but prevents tampering.

Application	Air Conditioning Refrigeration Coil Icing Detection; Defrost Cycle Initiation
Brand	Dwyer
Frequency Range	60 Hz
Pressure Range	1.40-5.5" W.C
Power/Voltage	120-277 VAC
Set Point/Set Point Range	1.40-5.5" w.c.

Minimum order quantity: 5 Piece

Dwyer Series 1900-5 Compact Low Differential Pressure Switch

RANGE 1.40-5.5" W.C.

Description
Most popular SERIES 1900 combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. Series 1900 switches have set points from 0.07 to 20" w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering.

• Compact size and repeatability, provides a high-value switch for many industrial and OEM applications.

• Range screw protected inside enclosure provides simplifies making adjustments but prevents tampering.

Application	Air Conditioning Refrigeration Coil Icing Detection; Defrost Cycle Initiation
Brand	Dwyer
Power	120 - 277 VAC
Set Point/Set Point Range	3.0-11.75" w.c.
Pressure Range	3.0-11.75" W.C
Max. Tempreture	-30 to 180 DegreeF
Frequency	60 Hz

Dwyer Series 1900-10 Compact Low Differential Pressure Switch

RANGE 3.0-11.75" W.C.

Description
Most popular SERIES 1900 combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. Series 1900 switches have set points from 0.07 to 20" w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering.

• Compact size and repeatability, provides a high-value switch for many industrial and OEM applications.

• Range screw protected inside enclosure provides simplifies making adjustments but prevents tampering.

Application	Air Conditioning Refrigeration Coil Icing Detection; Defrost Cycle Initiation
Brand	Dwyer
Frequency Range	4.0-20.0" W.C
Power/Voltage	120 - 277 VAC
Product Series	1900 Series
Max. Temprature	-30 to 180 DegreeF
Set Point/Set Point Range	4.00-20.00" w.c.

Dwyer Series 1920-10 Compact Low Differential Pressure Switch

RANGE 4.0-20.0" W.C.

Description
Most popular SERIES 1900 combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. Series 1900 switches have set points from 0.07 to 20" w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering.

• Compact size and repeatability, provides a high-value switch for many industrial and OEM applications.

• Range screw protected inside enclosure provides simplifies making adjustments but prevents tampering.

Brand	Dwyer
Weight	581 Gm
Temprature Limits	-34 to 82.2 DegreeC
Pressure Limits	45" W.C.
Electricity Range	120 - 480 VAC
Frequency	60 Hz

Dwyer Series 1900-0 Compact Low Differential Pressure Switch.

Range 0.15 - 0.55" W.C.

The Dwyer 1910-0 Compact Low Differential Pressure Switch combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. For air and non-combustible compatible gases, 19100 switches have set points from 0.15 - 0.55" w.c.. Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering. UL, CE and CSA listed, and FM approved.

• Range: 0.15 - 0.55" W.C.
• Flame-proof ATEX enclosure protects the device in hazardous areas
• Compact size and repeatability, provides a high-value switch for many industrial and OEM applications
• Range screw protected inside switch enclosure prevents tampering
• No power to operate DPDT switch means no additional wiring or conduit reduces material and installation labor costs
• Easy access for modifying set point simplifies adjustment
• Both control contacts activate at the same time eliminating system issues where lead switch activities preventing the lagging switch from sending a signal.

Brand	Dwyer
Power	120 - 277 VAC
Pressure Range	0.07 - 0.15" WC
Usage/Application	Air Conditioning Refrigeration Coil Icing Detection; Defrost Cycle Initiation
Input (S)	Resistive 1/8 HP at 125 VAC,1/4 HP at 250 VAC
Temprature	-30 to 180 DegreeF

Dwyer Series 1900-00 Compact Low Differential Pressure Switch

Range 0.07 - 0.15" W.C.

Description
Most Popular SERIES 1900 Combines Advanced Design and Precision Construction to make these switches able to perform many of the tasks of larger, costlier units. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. Series 1900 switches have set points from 0.07 to 20" w.c. (1.8 to 508 mm). Set point adjustment is easy with range screw located inside conduit enclosure. Internal location helps prevent tampering.

• Compact size and repeatability, provides a high-value switch for many industrial and OEM applications.

• Range screw protected inside enclosure provides simplifies making adjustments but prevents tampering.