Industrial 18301 Liquid Flow Switch

Description:

The Thomas Products 18301 Right Angle Liquid Flow Switch Model 1300 is used for monitoring liquid flow and actuating electrical control circuits when a preset flow rate is reached. Commonly installed in coolant systems, HVAC equipment, machine tools, and industrial process applications, this right-angle flow switch features a 3/4-inch NPT bronze body with a factory-set 1.5 GPM actuation point for dependable flow detection in compact installations. Maintenance teams and system integrators use this part for repair, retrofit, expansion, and replacement of industrial liquid flow monitoring systems. 

Applications:

The Thomas Products 18301 is designed for liquid flow sensing in water, oil, and other compatible fluids where installation space requires a 90-degree flow path. It is widely used in machine tool coolant systems, HVAC equipment, industrial cooling loops, lubrication systems, and OEM process equipment. The rugged one-piece bronze housing provides low pressure drop, while the factory-replaceable switch capsule simplifies maintenance and minimizes downtime.

Technical Specifications:

• Manufacturer Part Number (MPN): 18301
• Brand: Thomas Products Ltd.
• Model: 1300 Series
• Product Type: Right Angle Liquid Flow Switch
• Housing Material: Bronze
• Flow Path: 90° Right Angle
• Process Connection: 3/4 in NPT (Both Ports)
• Factory Flow Set Point: 1.5 GPM (Increasing Flow)
• Operating Media: Water, Oil, and Compatible Liquids
• Switch Type: 20 W SPDT Reed Switch
• Electrical Rating: 20 VA Pilot Duty
• Operating Pressure: 400 PSI @ 100°F
• Proof Pressure: 800 PSI @ 100°F
• Burst Pressure: 1200 PSI @ 100°F
• Operating Temperature: -20°F to +300°F (Optional up to 400°F)
• Wiring: 18 AWG, 24 in Polymeric Lead Wires
• Shuttle Material: Teflon with Ceramic Ring Magnet
• Spring Material: 316 Stainless Steel
• O-Ring Material: Viton® ("A")
• Set Point Accuracy: ±10% Maximum
• Repeatability: 1% Maximum Deviation
• Features: Factory-Replaceable Switch Capsule, Low Pressure Drop Globe-Shaped Housing, Shock and Vibration Resistant, Field-Serviceable Design

Common Replacements:

• Thomas Products 18300
• Thomas Products 18302
• Thomas Products 18303