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125-4821 | Water level control | cast iron chamber | SPST mercury switch | opens on decrease. | Dwyer Instruments

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Dwyer Instruments 125-4821 Documents

Instruction Manual Series 123/125 Catalog Page Mercury More Info

Overview

Details for 125-4821

SPST Water Level Sensor: Dwyer Instruments NCO-125-4821 The Dwyer Instruments NCO-125-4821 is a Single Pole Single Throw (SPST) water level sensor designed to provide reliable level detection in various industrial applications. This versatile sensor is suitable for use in tanks, reservoirs, or other liquid-containing vessels. Key Features: * SPST switching mechanism, providing simple level detection * Durable construction with corrosion-resistant materials * Compact design for easy installation in confined spaces * Adjustable sensing distance for customized level detection * Proven performance in demanding industrial environments Applications: The NCO-125-4821 water level sensor finds applications in: * Chemical processing * Water treatment * Food and beverage industry * HVAC systems * Industrial automation Benefits: * Improved process efficiency through accurate level monitoring * Enhanced safety by preventing overfill or dry run conditions * Reduced maintenance costs with its durable construction * Reliable operation in challenging industrial environments Our HVAC supply store offers the most competitive prices and rapid shipping on the NCO-125-4821 water level sensor from Dwyer Instruments. Our commitment to providing superior customer service ensures that you get the right sensor for your specific application. Contact us today to discuss your requirements and experience the Our HVAC supply store difference!

Series 123/125 Boiler Water Level Control

Heavy Duty, Cast Iron Chamber

The Series 123 & 125 Boiler Water Level Controls are designed for boiler applications, the 123 is primarily used for low water cut-off or feed-water control. Other applications include condensate tanks and deaerators. A special snap action switch mechanism eliminates frequent operation due to surging water level. A transparent cover provides convenient visible operation of the switch. Features a flanged chamber for easy clean out and replacement of float or switch mechanism without removing the unit from piping. The 125 offers the same long lasting service with a direct action mercury switch movement that provides a close deadband where needed.

Product Applications

Boiler Low Water Cut-Off
Boiler Feed-Water Control
Condensate Tanks
Deaerators

Special snap action switch mechanism options eliminates frequent operation due to surging water level
Transparent cover provides convenient visible operation of the switch
Flanged chamber for easy clean out and replacement of float or switch mechanism without removing the unit from piping

Specifications

Series: 123/125 Boiler Water Level Control
Category/Type: Level
Type: Level Switches
Series: 123/125 Boiler Water Level Control
Service: Compatible liquids. Cast iron is not for use with lethal or flammable substances either liquid or gaseous.
Wetted Materials: Body: Cast iron. Float: 304 SS. Trim and packing gland: Brass. Packing: Carbon. Body gasket: Carbon.
Temperature Limit: Ambient Temperature: 212°F (100°C);Process Temperature: 365°F (185°C).
Pressure Limit: 150 psig (10.34 bar).
Enclosure Rating: General purpose. Optional weatherproof.
Switch Type: SPDT snap switch or mercury switch. Optional DPDT or two stage.
Electrical Rating: Snap switch: 15 A @ 120/240/480 VAC; 0.5 A @ 120 VDC resistive; 0.25 A @ 240 VDC resistive. Mercury switch: 4 A @ 120 VAC/DC; 2 A @ 240 VAC/DC.
Electrical Connections: Screw terminal.
Conduit Connection: 7/8" (22.23 mm) hole for 1/2" (12.7 mm) conduit.
Process Connections: 1" female NPT.
Mounting Orientation: Vertical.
Deadband: Approximately 1-1/2" (38.1 mm).
Specific Gravity: 0.88 min.
Options: Manual reset.
Weight: 20 lb (9.1 kg).
Agency Approvals: CSA; UL. (Snap switch is not rated).