
Flow Switches
Liquid Flow Switches
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List Price $695.00 $541.90 / eachSKU: MH1165Ships within 6 weeksMcDonnell & Miller model number FS7-4 is a 120 volt, single pole, double throw, snap liquid flow switch for universal industrial large pipe applications such as heating and hydronic systems, air conditioning refrigeration, and process work. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 119700
List Price $695.00 $541.90 / each -
List Price $658.68 $439.12 / eachSKU: MH1139AShips within 4 weeksDwyer Instruments Series V6 FlotecT mini-size 1/2" SPDT low flow switch for monitoring liquid, gas, or air flows. This switch is explosion-proof with a brass upper and lower body. Learn More
- Manufacturer : Resideo
- Part Number : V6EPB-B-S-LF
List Price $658.68 $439.12 / each -
List Price $464.80 $362.41 / eachSKU: MH11393 in stock Ships today if ordered by 3:00 PM CSTMcDonnell & Miller model number FS1-W is a 120 volt, single pole, double throw, snap liquid flow switch for high sensitivity requirements on low to moderate flow rates such as air conditioning, heating, and hydronic systems. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 113601
List Price $464.80 $362.41 / each -
List Price $415.00 $323.58 / eachSKU: MH1140Ships within 10 business daysMcDonnell & Miller model number FS1 is a 120 volt, single pole, double throw, snap liquid flow switch for high sensitivity requirements on low to moderate flow rates such as air conditioning, heating, and hydronic systems. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 113200
List Price $415.00 $323.58 / each -
List Price $240.00 $187.13 / eachSKU: MH11424 in stock Ships today if ordered by 3:00 PM CSTMcDonnell & Miller 120611 Liquid Flow Switch model FS251 with NEMA 1 enclosure, 1" NPTM pipe connection, and four stainless steel paddle options (1", 2", 3", and 6"). Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 120611
List Price $240.00 $187.13 / each -
List Price $320.00 $249.00 / eachSKU: MH1142C5 in stock Ships today if ordered by 3:00 PM CSTMcDonnell & Miller model number FS254 is a 120 volt, single pole, double throw, snap liquid flow switch for starting and stopping electrical equipment such as alarms, motors, and automatic burners. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 120610
List Price $320.00 $249.00 / each -
List Price $330.40 $257.61 / eachSKU: MH11463 in stock Ships today if ordered by 3:00 PM CSTMcDonnell & Miller model number FS4-3RP-T is a 120 volt, single pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114639
List Price $330.40 $257.61 / each -
List Price $780.00 $608.16 / eachSKU: MH1146B3 in stock Ships today if ordered by 3:00 PM CSTMcDonnell & Miller model number FS4-3S is a 120 volt, single pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114641
List Price $780.00 $608.16 / each -
List Price $410.00 $319.68 / eachSKU: MH1148Ships within 10 business daysMcDonnell & Miller model number FS4-3D is a 120 volt, double pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114550
List Price $410.00 $319.68 / each -
List Price $920.00 $717.32 / eachSKU: MH1148AShips within 10 business daysMcDonnell & Miller model number FS4-3-DS is a 120 volt, double pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114642
List Price $920.00 $717.32 / each -
List Price $410.00 $319.68 / eachSKU: MH1150Ships within 10 business daysMcDonnell & Miller model number FS4-3T is a 120 volt, single pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114800
List Price $410.00 $319.68 / each -
List Price $410.00 $319.68 / eachSKU: MH1150AShips within 10 business daysMcDonnell & Miller model number FS4-3T1-1 is a 120 volt, single pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 115100
List Price $410.00 $319.68 / each -
List Price $410.00 $319.68 / eachSKU: MH1150BShips within 10 business daysMcDonnell & Miller model number FS4-3T2-3/4" is a 120 volt, single pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114900
List Price $410.00 $319.68 / each -
List Price $410.00 $319.68 / eachSKU: MH1150CShips within 10 business daysMcDonnell & Miller model number FS4-3T2-1" is a 120 volt, single pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 115200
List Price $410.00 $319.68 / each -
List Price $410.00 $319.68 / eachSKU: MH1150DShips within 10 business daysMcDonnell & Miller model number FS4-3T3-1" is a 120 volt, single pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 115300
List Price $410.00 $319.68 / each -
List Price $410.00 $319.68 / eachSKU: MH1151Ships within 10 business daysMcDonnell & Miller model number FS4-3T3 is a 120 volt, single pole, double throw, snap liquid flow switch for universal general purpose applications for starting and stopping electrical operation equipment such as signals, alarms, motors, automatic burners, and metering devices. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 115000
List Price $410.00 $319.68 / each -
List Price $425.00 $331.38 / eachSKU: MH1155Ships within 10 business daysMcDonnell & Miller model number FS5-3/4" is a 120 volt, single pole, double throw, snap liquid flow switch for general purpose applications requiring low flow rate sensitivity. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114760
List Price $425.00 $331.38 / each -
List Price $425.00 $331.38 / eachSKU: MH1156Ships within 10 business daysMcDonnell & Miller model number FS5-1" is a 120 volt, single pole, double throw, snap liquid flow switch for general purpose applications requiring low flow rate sensitivity. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114780
List Price $425.00 $331.38 / each -
List Price $1,775.20 $1,384.11 / eachSKU: MH1156AShips within 10 business daysMcDonnell & Miller FS5-DS-1" model number is a stainless steel 120 volt, single pole, double throw, snap liquid flow switch for general purpose applications requiring low flow rate sensitivity. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114793
List Price $1,775.20 $1,384.11 / each -
List Price $1,690.00 $1,317.68 / eachSKU: MH1156BShips within 10 business daysMcDonnell & Miller model number FS5-S-1" is a stainless steel 120 volt, single pole, double throw, snap liquid flow switch for general purpose applications requiring low flow rate sensitivity. Learn More
- Manufacturer : McDonnell & Miller
- Part Number : 114795
List Price $1,690.00 $1,317.68 / each

