Dwyer 1910-0/1910-10 Series 1900 Compact Low Differential Pressure Switch

• Customization: Available
• Type: SPDT
• Usage: Control Switch
• Model NO.: 1910-0
• Application: Industrial
• Brand: Dwyer
• Certification: CE
• Series: 1900
• Deadband: 0.1 inH2O
• Electrical Connection: 7/8 in knockout with Screw Terminal block
• GrossWeightValue: 0.85
• Materials, Wetted: Consult Factory
• Measurement Pressure, Max: 0.5 inH2O
• Measurement Pressure, Min: 0.15 inH2O
• Media Compatibility: Clean dry air / inert gas, HVAC / room air, Inert
• Mounting Orientation: Vertical Diaphragm
• Operating Temperature, Max: 180 °F
• Operating Temperature, Min: -30 °F
• Measurement Pressure Type: Differential
• Transport Package: Carton
• Trademark: Dwyer
• Origin: Amercia

Product Description

1. Product Overview

 

 

Item	Description
Product Series	Series 1900 Compact Low Differential Pressure Switches
Design Philosophy	Combines advanced design and precision construction to perform many tasks of larger, costlier units.
Primary Application Field	Designed for air conditioning service; also serves many fluidics, refrigeration, oven and dryer applications.
Set Point Range	From 0.07 to 20 in w.c. (1.8 to 508 mm).
Adjustment Feature	Set point adjustment is easy with range screw located inside conduit enclosure; internal location helps prevent tampering.
Agency Approvals	UL, CE and CSA listed, and FM approved.
Compatible Media	For use with air or compatible gases.

Key Design Illustration:

• Series 1910 switch with conduit enclosure off: Shows electric switch and set point adjustment screw located on same side for easy installation.

• Dwyer-engineered force-motion amplifier: Increases the leverage of diaphragm movement and results in a switch with excellent sensitivity and repeatability.

 

2. Features & Benefits

 

 

Feature	Benefit
Compact Size and Repeatability	Provides a high-value switch for many industrial and OEM applications.
Wide Range of Models	From 0.07 in w.c. to 20 in w.c. can meet exacting OEM specifications for a low pressure switch.
Range Screw Protected Inside Enclosure	Simplifies making adjustments but prevents tampering.

 

3. Applications

 

 

Application Area

Air conditioning refrigeration coil icing detection; defrost cycle initiation

Clogged filter detection

Variable air volume controller

 

4. Specifications

 

 

Specification	Details
Service	Air and non-combustible, compatible gases.
Wetted Materials	Consult factory.
Temperature Limits	-30 to 180°F (-34 to 82.2°C).
Pressure Limits	45 in w.c. (11.2 kPa) continuous, 10 psig (68.95 kPa) surge.
Switch Type	Single-pole double-throw (SPDT).
Repeatability	±3%.
Electrical Rating	15 A @ 120-480 VAC, 60 Hz. Resistive 1/8 HP @ 125 VAC, 1/4 HP @ 250 VAC, 60 Hz. Derate to 10 A for operation at high cycle rates.
Electrical Connections	3 screw type: common, normally open and normally closed.
Process Connections	1/8" female NPT.
Mounting Orientation	Diaphragm in vertical position. Consult factory for other position orientations.
Set Point Adjustment	Screw type inside conduit enclosure.
Weight	1 lb 4.5 oz (581 g).
Compliance	CE, CSA, FM, and UL. Optional -EXPL explosion-proof enclosure does not possess any compliance.

 

5. Model Chart

 

 

Model	Operating Range (in w.c.)	Approximate Deadband (Rising)	Approximate Deadband (Falling)
1910-00	0.07 to 0.15	0.04	0.04
1910-0	0.15 to 0.50	0.10	0.10
1910-1	0.40 to 1.60	0.15	0.16
1910-5	1.40 to 5.50	0.30	0.30
1910-10	3.0 to 11.75	0.40	0.40
1910-20	4.0 to 20.00	0.40	0.50

 

6. Options

 

 

Option	Description	Ordering Instructions	Example
Weatherproof Housing	16 ga. steel enclosure with gasketed cover (NEMA 4, IP66) for wet or oily conditions. Withstands 200 hour salt spray test. Wt. 5-1/2 lb (2.5 kg). Switch must be factory installed.	Change 1910 base number to 1911, add -WP suffix.	1911-1-WP
Explosion-Proof Housing	Cast iron base with brass cover. Rated Class I, Groups D; Class II, Div. 2, Groups E, F, G; Class III and NEMA 7, 9 NEMA 3. (7 lb). Switch must be factory installed.	Change 1910 base number to 1911, add -EXPL suffix.	1911-1-EXPL
Manual Reset Option (Model 1900 MR)	Includes special snap switch which latches on pressure increase above the setpoint. Switch must be manually reset after pressure drops below the setpoint. Available on -1, -5, -10 or -20 ranges only. Option is not UL, CSA or FM listed. For use only in single positive pressure applications.	Change 1910 base number to 1900, add -MR suffix.	1900-10-MR

 

7. Accessories

 

 

Model	Description
A-302F-A	303 SS static pressure tip with mounting flange; for 3/16" ID rubber or plastic tubing; 4" insertion depth; includes mounting screws.
A-329	Street ell; brass adaptor for applications requiring right angle connections; two required for differential pressures.
A-399	Duct pressure monitor kit; for use with standard or manual reset model switches; includes mounting flange, tubing and adapters.
A-489	4" straight static pressure tip with flange.

 

8. Additional Information

 

 

Item	Details
Manual Reset Option Image	Shown in document (visual reference).
California Proposition 65 Warning	This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to .
Process Tubing Options	See page 453 (Gage Tubing Accessories).

 

BNSENS (Nanjing) Sensor Technology Co., Ltd. is located in Nanjing, China. It is a high-tech enterprise specializing in the development, manufacturing and trade of sensor products. The company has brought together a group of outstanding technical experts in various fields such as automation, electronics, machinery and computers. All employees of the company have college degrees or above. It adopts the world-class management and operation model and 6 sigma quality system. At present, the company's main products are pressure, liquid level, flow, current, switches, etc. The company's users are all over the country, and some products have been exported to Japan, South Korea and Southeast Asia.

Since its inception, the company has been based on the technical accumulation and management standards of American sensor giants. It is composed of senior engineers and managers who have served in multinational companies for many years, and has rapidly developed various pressure sensors, transmitters, liquid level, flow meters, pressure switches, digital meters, current sensors, proximity switches and other products. After years of unremitting efforts, it has become one of the leading suppliers in the domestic automation industry. Our pressure transmitters can achieve an accuracy of more than 3/10, 000. The products have been widely used in oil, natural gas, electricity, chemical industry, metallurgy, building materials, food, light industry, environmental protection, aerospace, tap water, municipal and other industries.

It is a sensor science and technology innovation company that masters the core technology of MEMS chips. The company has a research and development center in Minnesota, USA. The leader is Dr. Pan Hanjin, a famous scientist in the sensor industry. Dr. Pan Hanjin has been deeply involved in the sensor industry for more than 20 years and is an expert in the sensor industry.

The company has a number of ASIC chips independently developed, which are widely used in industrial, automotive, home appliance and other markets.

BNSENS (Nanjing) Sensing Technology Co., Ltd. is a strategic partner of Honeywell in China. The two parties proposed a plan of East serving East and jointly developed several sensors specifically for the Chinese market. These sensors will be widely used in intelligent manufacturing, Internet of Things, artificial intelligence, and smart home fields. These sensors include: Magnetic sensors, temperature sensors, humidity sensors, force sensors, fire water pressure sensors, equipment vibration sensors, human body status monitoring sensors, motion sensors, etc.

History of BNSENS Company:

BNSENS is a company focusing on sensors, instruments, and electronic components. We are a young company, founded in 1999, just 25 years old, and we are still growing.

1999: The company's first pressure sensor was launched, mainly for the petroleum and petrochemical industries.

2002: The company expanded its product line and launched temperature sensors

2005: Started producing high-precision pressure sensors for the test and measurement market

2006: Became an official authorized agent of Honeywell

2009: Introduced the Six Sigma management system, and the product qualification rate was greatly improved

2010: Became a supplier of Emerson

2011: We started selling SICK sensors

2014: Introduced the sensor production line from Germany, developed more industrial control sensors, and cooperated with TSMC

2015: Cooperated with Siemens in Vietnam

2017: The factory moved to Nanjing High-tech Zone

2019: Became a national high-tech enterprise in China

2023: We started selling products from Infineon and Rohm

BNSENS, The Future Starts Here.