Series 1950 Explosion-proof Differential Pressure Switch
FEATURES/BENEFITS
• Explosion-proof and weatherproof housing provides device protection for outdoor
use or harsh environment operation
• External set point screw provides easy access that simplifies making adjustments
without opening or disassembling enclosure
• Easily accessible electrical connection simplifies the installation
APPLICATIONS
• HVAC applications • Process applications • All-weather applications
Series PG Gas Pressure/Differential Pressure Switch
FEATURES/BENEFITS
• Clear easy-to-read scale and external set point adjustment simplifies operation and
trouble shooting
• Large diaphragm provides accuracy for precise control
• Multiple switching options meet the design of applications
APPLICATIONS
• Natural, manufactured or LP gas applications
FEATURES/BENEFITS
• Visible set point and on-off indicator simplifies operation and trouble shooting
• Compact size and low cost make it ideal for gas fired or gas equipment OEM
applications
APPLICATIONS
• Gas furnaces • Natural, manufactured or LP gas applications
FEATURES/BENEFITS
• Single or dual action switches support consistent designs with similar models, but
with the ability to match specific application needs
• Sealed diaphragm provides leak-proof construction for high accuracy and precision
control
APPLICATIONS
• Damper positioning • Duct air control
Series 1640 Floating Contact Null Switch for High and Low Actuation
FEATURES/BENEFITS
• Floating “null” switch supports applications requiring two set point actions such as
open and close damper control
• Visible set point indicator simplifies operation and trouble shooting
• Large diaphragm provides low range accuracy providing precise control
APPLICATIONS
• Damper positioning
• Duct air control
Series 1831 DPDT Low Differential Pressure Switches
FEATURES/BENEFITS
• 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 prevent the lagging switch from sending a signal
APPLICATIONS
• High duct static cutout applications • HVAC
FEATURES/BENEFITS
• Low cost, long service life and fast response time is suitable for a wide range of OEM
uses
• Lightweight but shock and vibration resistant for tough applications
• Gold contacts help ensure a clean connection without dirt or oxidation
APPLICATIONS
• Air proving • Cleaning and purification
• Ventilation flow • Heavy equipment and machinery
• Pressure monitoring • Exhaust ducts
Series AT11910 ATEX Approved 1910 Differential Pressure Switch
FEATURES/BENEFITS
• 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
• 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 switch enclosure prevents tampering
APPLICATIONS
• Hazardous area low pressure applications
• Air conditioning refrigeration coil icing detection; defrost cycle initiation
• Clogged filter detection
• Variable air volume controller
Series 1900 Compact Low Differential Pressure Switches
FEATURES/BENEFITS
• 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 provides simplifies making adjustments but
prevents tampering
APPLICATIONS
• Air conditioning refrigeration coil icing detection; defrost cycle initiation
• Clogged filter detection
• Variable air volume controller
Series AT21823 ATEX Approved 1823 Differential Pressure Switch
FEATURES/BENEFITS
• Compact size and repeatability, provides a high-value switch for many industrial
applications
• External setpoint knob provides easy access that simplifies making adjustments
without opening enclosure
• Flame-proof ATEX enclosure protects the device in hazardous areas
APPLICATIONS
• Hazardous area pressure switch
• Process applications
• Mechanical equipment control
Attention: Check local safety rules and warnings on unit and manual for a correct use
of the instrument in hazardous area.
Series 1800 Low Differential Pressure Switch for General Industrial Service
FEATURES/BENEFITS
• Compact size and repeatability, provides a high-value switch for many industrial
applications
• Designed for panel and wall mounting and provides easy access that simplifies
making adjustments or changes to switch setting
• Wide range of models from 0.07 in w.c. to 85 in w.c. can meet exacting specifications
for a low pressure switch
APPLICATIONS
• Process applications
• Mechanical equipment control
Series AT1ADPS ATEX Approved ADPS Adjustable Differential Pressure Switch
FEATURES/BENEFITS
• Flame-proof ATEX enclosure with optional glass window and aluminum housing
protects the device in hazardous areas while giving local visibility to set point status
APPLICATIONS
• Hazardous area pressure switch
• Air filter and ventilator monitoring
• Ventilation duct monitoring
• Industrial cooling circuits
• Fan heater overheating protection
• Fire-protection damper control
• Heat exchanger frost protection
FEATURES/BENEFITS
• Adjustment knob changes switching pressure easily with a pressure gage reducing
components for application
• Low cost device makes it an excellent solution in BAS and HVAC applications
requiring duct control and monitoring
• Relay contact allows simple integration with DDC or building systems
APPLICATIONS
• Air filter and ventilator monitoring • Ventilation duct monitoring
• Industrial cooling circuits • Fan heater overheating protection
• Fire-protection damper control • Heat exchanger frost protection
Series MP Mini-Photohelic® Differential Pressure Switch/Gage
FEATURES/BENEFITS
• Gage reading unaffected by switch operation and will continue to read pressure even
during power loss
• Visible switch status LED provides indication of set point switching state
• Compact design but with the power of larger devices can meet the same application
specifications
FEATURES/BENEFITS
• Gage reading unaffected by switch operation and will continue to read pressure even
during power loss
• Zero and range adjustments outside of gage means no disassembly in normal
service
• Solid-state design allows for switching in high cycle rate applications without
degradation
• Optional stainless steel bezel is the same installation diameter as Magnehelic® gage
and simplifies field upgrade to Photohelic® switch/gage
APPLICATIONS
• Pneumatic conveying
• Air conditioning systems
• Clean rooms
