NEW MCDONNELL FS1 FLOW SWITCH

The McDonnell & Miller Series FS1 is a high sensitivity in-line liquid flow switch designed for general purpose applications requiring precise detection of low to moderate flow rates, including air conditioning, heating, hydronic systems, water, fuel oil, and process fluids. It features a 1/2" NPT in-line connection that eliminates the need for a pipe tee, a single pole double throw (SPDT) snap-action switch, and a fully sealed switch compartment to protect it from liquid contact. A sensitivity adjusting screw allows for easy on-site flow adjustment within the specified range.
Specification
Value
Brand
McDonnell & Miller
Model / Part Number
FS1 Flow Switch
Manufacturer Part Number (MPN)
113200
Series
FS1
Type
High Sensitivity Liquid Flow Switch
Switch Type
Single Pole, Double Throw (SPDT) Snap Switch
Voltage
120/240 VAC
Frequency
50/60 Hz
Full Load Amps (120 VAC)
7.4 A
Full Load Amps (240 VAC)
3.7 A
Locked Rotor Amps (120 VAC)
44.4 A
Locked Rotor Amps (240 VAC)
22.2 A
Pilot Duty Rating
125 VA at 120 or 240 VAC
Pipe Connection Size
1/2" NPT
Connection Type
In-Line (Threaded x Threaded)
Flow Rate — Minimum (Flow Setting)
0.41 GPM (1.55 LPM)
Flow Rate — Maximum (Flow Setting)
1.81 GPM (6.85 LPM)
Flow Rate — Minimum (No-Flow Setting)
0.24 GPM (0.91 LPM)
Flow Rate — Maximum (No-Flow Setting)
1.28 GPM (4.84 LPM)
Maximum Liquid Pressure
100 PSI (7 kg/cm²)
Maximum Flow Velocity
10 ft/sec (3 m/sec)
Liquid Temperature Range
32°F – 225°F (0°C – 107°C)
Ambient Temperature Range
32°F – 120°F (0°C – 49°C)
Enclosure Rating
NEMA 1 (IP 21)
Applicable Standards
UL Listed (Canada and US)
Overall Dimensions (W x H)
3-13/16" W x 4-7/16" H
Overall Dimensions (L x W x H)
5.05" x 7.3" x 4.3"
Weight
3.09 lbs
Application
HVAC, Hydronic Systems, Air Conditioning, Heating, Water, Fuel Oil, Process Liquids
Manufacturer
McDonnell & Miller (a Xylem brand)
We warranty all items for 30 days from date of purchase.