McDonnell & Miller FS1 High Sensitivity Liquid Flow SwitchMcDonnell & Miller FS1 High Sensitivity Liquid Flow Switch is an in line flow switch designed for precise monitoring of liquid flow. This 1 2 inch nominal size unit features end connections that are threaded x threaded, making installation straightforward in standard piping systems. Built for reliable performance in heating, cooling, and boiler circuits, the FS1 offers an adjustable sensitivity screw for fine tuning response and an ample flow capacity

The loading air gap is 1/8 to 3/16 inch

Differential: 1–16°C

OEM-style replacement part for Fireye controls and gas burners

Media: hot/chilled water and glycol

Travel time: 30–60 seconds

The Pkg L is compatible with standard HVAC configurations and is designed to integrate with existing ducting and controls

making it a versatile choice for gas valve maintenance and replacement

It is ideal for hydronic heating and cooling applications requiring precise modulation and dependable performance across an ambient temperature up to 104 Deg F

The link pins are made from anealed w1 tool steel for a proper fit and are tig welded to the outer link of the chain for superior support and strength

ideal for commercial and industrial installations

this unit features four speeds and an eight-pole configuration to balance airflow

This thermostat kit is designed for natural gas systems and is intended for use on residential gas water heaters