Safety Switches & Accessories: Reliable Protection & Control
Midwest Supply is your trusted source for a wide selection of affordable safety switches and accessories from leading brands like York, Nortek, Honeywell Home, and more. We offer a variety of switch actions (fusible, non-fusible, maintained) in durable materials (brass, steel, steel enclosures) to meet your industrial control requirements.
All Manufacturers
Airco Electrical Bosch Electrical Bradford White Electrical Broan Fans Electrical Buderus Electrical Burnham Boilers Electrical Carlin Electrical Electrical Electrical First Co Electrical Heat Transfer Prod Electrical Honeywell Home Electrical Honeywell Inc Electrical Intellihot Electrical Laars Electrical Lochinvar Electrical Mars Controls Electrical Mcdonnell Miller Electrical Modine Electrical
Navien Boilers & Water Heaters Electrical R.W. Beckett Electrical Rinnai Electrical Thermo Pride Furnaces Electrical Tjernlund Electrical Water Heater Parts Electrical Weil Mclain Electrical York Electrical
Navien Boilers & Water Heaters Electrical R.W. Beckett Electrical Rinnai Electrical Thermo Pride Furnaces Electrical Tjernlund Electrical Water Heater Parts Electrical Weil Mclain Electrical York Electrical
View Details
100111056 | Switch Blower Prover 0.75 Inch Water Column Normally Open | Water Heater Parts
Brand: Water Heater Parts
SKU: 100111056
View Details
100110615 | Switch Blower Prover 0.45 Inch Water Column Normally Open | Water Heater Parts
Brand: Water Heater Parts
SKU: 100110615
View Details
100110806 | Switch Blower Prover 2.50 Inch Water Column Normally Open | Water Heater Parts
Brand: Water Heater Parts
SKU: 100110806
View Details
100109962 | Pressure Switch Water Heater Blower 100109962 for Model BTH SUF Series 970 Commercial | Water Heater Parts
Brand: Water Heater Parts
SKU: 100109962
View Details
100109100 | Limit Switch Thermo High Manual Reset 200 Degrees Fahrenheit | Water Heater Parts
Brand: Water Heater Parts
SKU: 100109100
View Details
100108906 | Limit Switch High Surface Mount 220 Degrees Fahrenheit | Water Heater Parts
Brand: Water Heater Parts
SKU: 100108906
View Details
100073334 | Pressure Switch High/Low Gas Manual Reset for FTX500 | Lochinvar
Brand: Lochinvar
SKU: 100073334
View Details
100073333 | Pressure Switch High/Low Gas Manual Reset for FTX600-850 | Lochinvar
Brand: Lochinvar
SKU: 100073333
View Details
110400 | Switch 5-M Electric with Manual Reset 120/240 Volt | Mcdonnell Miller
Brand: Mcdonnell Miller
SKU: 110400
View Details
106038-01 | Outdoor Sensor Kit for Hydrolevel 48-140 | Burnham Boilers
Brand: Burnham Boilers
SKU: 106038-01
View Details
43345 | Pressure Switch SPST Close on Rise 1/4 Inch Female Flare 5 to 45 PSI | Mars Controls
Brand: Mars Controls
SKU: 43345
View Details
351012 | Pressure Switch Drain Inducer 351012 | Thermo Pride Furnaces
Brand: Thermo Pride Furnaces
SKU: 351012
View Details
311200 | Float 21-30 Replacement for 21 Series | Mcdonnell Miller
Brand: Mcdonnell Miller
SKU: 311200
View Details
114639 | Flow Switch FS4-3RP-T Liquid with Test Feature 1 Inch NPT | Mcdonnell Miller
Brand: Mcdonnell Miller
SKU: 114639
View Details
109714-01 | Low Water Cut Off Control Xylem PSE801 with Harness and Probe | Burnham Boilers
Brand: Burnham Boilers
SKU: 109714-01
Application
- 10C403
- 10C437
- 10C438
- 97% Modulating Multi Position 33IN Natural Gas Furnaces
- All DL Series
- All G8C
- Auto-Draft Inducers
- B2HN 36-60; D1CG 72; D1HG 48-60;D2CG 72; D6CG 36-60; D7CG 36-60
- Central Air
- Coleman Furnace
- ES2 X-2 CGE AG
- For HVACR Equipment
- Furnace
- G124X Boilers
- GV 3 Series Boilers
- HE/VHE Series
- HVACR Equipment
- Independence Series Boilers
- L8148E1299
- Low Water Cut Offs Water Feeder
- Low Water Cut Offs; Steam Boilers
- MITW/MIITW
- Model MIITW 50/65/75 Gas Water Heater
- Natural Gas Furnace
- Plus 30/40/60/80
- Power or Pilot Duty; Vending Machines; Appliances; Fan Controls; Heating and Air Conditioning
- SS1-R Side Wall Vent Systems
- Spirit Models
- T50M/80M/140M/199M/399M
- WHKE Millivolt Interlock Kit
- Water Heater
Collection
Details
- 120/100 Open/Close Auto Reset
- 120/240V
- 140/110 Open/Close Auto Reset
- 145 Open 105 Close
- 145/115 Open/Close Auto Reset
- 150 Open Manual Reset
- 150/110 Open/Close
- 150/120 Open/Close Auto Reset
- 155/125 Open/Close
- 160 Open Manual Reset
- 160/120 Open/Close
- 160/130 Open/Close Auto Reset
- 160/140 Open/Close Auto
- 165/135 Open/Close Auto Reset
- 170 Open Manual Close
- 170/140 Open/Close Auto Reset
- 175/145 Open/Close Auto Reset
- 180 to 240DEG F
- 180/150 Open/Close Auto Reset
- 180DEG F
- 185/155 Open/Close Auto Reset
- 195/165 Open/Close Auto Reset
- 200/170 Open/Close Auto Reset
- 200DEG F Switch; Manual Reset
- 215/185 Open/Close Auto Reset
- 220 Open 190 Close Auto Reset
- 225 Open 145 Close
- 225/145 Open/Close
- 255 Auto Reset
- 270 Open Manual Reset
- 300 Open Manual Close
- 300/220 Open/Close
- 90 Open 110 Close
- Manual Reset
- Mounted on Blower
- Open on Rise
- Open on Temperature Rise
Electrical Rating
End Connection
Material
Part Number
- 100108688
- 100109962
- 100275596
- 100278108
- 100517-01
- 10C188
- 10C213
- 10C214
- 10C382
- 2392208900
- 2394472304
- 27067
- 3250 Plus
- 350103
- 350124
- 350261
- 350473
- 350485
- 350495
- 350817
- 350891
- 350989
- 351012
- 351013
- 351017
- 351018
- 351023
- 351024
- 52259-001U
- 52259-002U
- 5H0794410009
- 65118678
- 7250P-081
- 7250P-096
- 7250P-147
- 7250P-150
- 7600P-007
- 7600P-502
- 7855P-262
- 80160737
- AOPS7218
Pressure
- -0.15IN Water Column On Fall Single Pole Normally Open
- -0.50IN Water Column On Fall Single Pole Normally Open
- -0.67IN Water Column On Fall Single Pole Normally Open
- .90IN Water Column
- 0.10IN Water Column On Fall Single Pole Normally Open
- 0.15IN Water Column On Fall Single Pole Normally Open
- 0.15inWC
- 0.20/0.35IN Water Column On Fall Single Pole Normally Open
- 0.20/0.40IN Water Column On Fall Single Pole Normally Open
- 0.20IN Water Column
- 0.20IN Water Column On Fall Single Pole Normally Open
- 0.35/0.90IN Deact Normally Open
- 0.40/0.90IN Water Column On Fall Single Pole Normally Open
- 0.40IN Water Column On Fall Single Pole Normally Open
- 0.45/0.85IN Water Column On Fall Single Pole Normally Open
- 0.45IN Water Column
- 0.45IN Water Column On Fall Single Pole Normally Open
- 0.50IN Water Column
- 0.50IN Water Column On Fall Single Pole Normally Open
- 0.53IN Water Column
- 0.54IN Water Column On Fall Single Pole Normally Open
- 0.55/1.20IN Water Column On Fall Single Pole Normally Open
- 0.60/0.20IN Water Column On Fall Single Pole Normally Open
- 0.60/1.05IN Water Column On Fall Single Pole Normally Open
- 0.60IN Water Column
- 0.60IN Water Column On Fall Single Pole Normally Open
- 0.63IN Water Column
- 0.65IN Water Column On Fall Single Pole Normally Open
- 0.67IN Water Column On Fall Single Pole Normally Open
- 0.70/1.25IN Water Column On Fall Single Pole Normally Open
- 0.75IN Water Column
- 0.75IN Water Column On Fall Single Pole Normally Open
- 0.85IN Water Column
- 0.90IN Water Column
- 0.90IN Water Column On Fall Single Pole Normally Open
- 0.95x.04IN Water Column
- 1.00IN Water Column On Fall Single Pole Normally Open
- 1.05/0.40IN Deact Normally Open
- 1.15IN Water Column
- 1.18IN Water Column
- 1.20/0.40 Deact Normally Open
- 1.20IN Water Column
- 1.20IN Water Column Normally Closed
- 1.20IN Water Column On Fall Single Pole Normally Open
- 1.45IN Water Column On Fall Single Pole Normally Open
- 1.4IN Water Column
- 1.60/0.40 Deact Normally Open
- 1.60IN Water Column On Fall Single Pole Normally Open
- 1/2PSI
- 175 Open 95 Close
- 1IN Water Column
- 250PSIG
- 3 to 30PSI
- 5 to 25PSI
- 5 to 30PSI
- 5 to 45PSI
- 5 to 50PSI
- 5 to 60PSI
- 5 to 80PSI
- 650 Open/450 ClosePSIG
- 650/450 Open/ClosePSIG
- 7 to 80PSI
- 7/22PSIG
- High
- Low
- Minimum
Product Type
- 0.90 TM9E100 and 120
- 1.10IN Water Column On Fall TM9E060
- 2 Level High Pressure
- 208/230V
- 220F Manual Reset Blocked Vent
- 300F Manual Reset Blocked Vent
- 60AMP Fused Single Phase
- 60AMP Non-Fused Single Phase
- Adapter
- Adjustable
- Air
- Air 1IN Water Column
- Air Differential
- Air Differential SPDT Compression Fitting 0.05 to 12IN WC
- Air Differential SPDT Knife Edge Fitting .30 to 12.0IN WC
- Air Flow Normally Open 0.15
- Air For Model GEN I/GEN II
- Air Negative
- Air Normally Open
- Air Pressure for 100-140K BTU Models
- Air S1-02425006704
- Air S1-02425808702
- Antunes High Gas
- Antunes Low Gas
- Aquastat 100-240DEG F Manual Reset Less Well
- Aquastat High Limit for Burnham Series 8H Boiler L4080B1212
- Auto
- Auto Reset 160F Trip
- Auxiliary
- Auxiliary 15-25 Ton Rooftop Unit
- Auxiliary 3-6 Ton Rooftop Unit
- Auxiliary 7-12 Ton Rooftop Unit
- B/W Heater
- Block Temperature
- Blocked Prover 0.46IN Water Column
- Blocked Vent
- Blower Prover -0.75IN Water Column
- Blower Prover 0.45IN Water Column
- Blower Prover 0.50IN Water Column
- Blower Prover 0.75IN Water Column
- Blower Prover 1.00IN Water Column
- Blower Prover 2.50IN Water Column
- Blower Prover 4.5IN Water Column
- Blower Prover 5.9IN Water Column
- Boiler
- Bulk Pack
- Burner Timer
- CC Blower Prover FV II
- Combination High/Low
- Condensate Blockage Pressure Switch
- Constant Volume
- Control
- Control Air
- Control High Refrigeration
- Control Refrigeration
- Control Rollout
- Control Rollout SPST
- Cutoff
- Cutoff with Manual Reset
- Differential
- Differential SPDT
- Door
- Drain Inducer
- Dual Air
- Dual Gas Control
- Dual Surface Mount
- Dwyer A306 Sensor
- ECO
- Electric Replacement
- Electric with Manual Reset
- Exhaust Pressure
- Exhaust for EF60T125/150/199
- Fan 6 Terminal DPST
- Fan Control
- Fan Kit
- Fan Timer
- Fan Timer Control Board
- Flame
- For 61/64/67/69/70/764/767
- For Combi Aspen
- For Combi K2WTC
- For HDB60/HDC60
- For Inducer
- For M2TW50T/65T
- For MITW40LLNCX-10
- For MITW40S/50S
- Fully Insulated
- Fully Insulated 100PK
- Fully Insulated 12PK
- Fully Insulated 25PK
- Furnace Door
- Fused 30A with Top Open 240V
- Fused 30AMP 120/240V with Intermediate Surge Protection
- Fused 30AMP 240V
- Fused 60AMP 120/240V with Intermediate Surge Protection
- Fused 60AMP 240V
- Gas
- General Purpose Liquid SPDT
- General Purpose SPDT with NEMA-1 Enclosure
- General Purpose SPDT with NEMA-4 Enclosure
- Green Label
- Heat Exchanger Over Temp Limit
- High
- High Auto
- High Auto SA-160HLS-A
- High Bulb Well
- High ECO
- High HW 100111987
- High HW 100111988
- High Limit
- High Limit with Auto Reset
- High Sensitivity Liquid SPDT
- High Stud Mount
- High Surface Mount
- High Temperature
- High Thermostat with Stainless Steel Well
- High with Manual Reset
- High/Low Gas Manual Reset
- Humidity JCI
- Igniter Sensor Electronic LEC PENN Y75AA-3D
- Immersion
- Insulated
- Insulated 100PK
- Insulated 20PK
- Integrated
- Kit for Hydrolevel 48-140
- Klixon L180-4
- Klixon L190-4
- L140-4
- L150-4
- L170-4
- L260F Manual Reset Blocked Vent
- Limit Control
- Limit S1-02526366003
- Limit SPDT
- Liquid with Test Feature
- Low
- Low 120 Volt
- Low Ambient with Switch
- Low Refrigeration
- Low Strap-On New Style
- Low Water Cut Off Controller Less Switch
- MR170
- Main
- Manual Reset
- Manual Reset 176F Trip
- Manual Reset High/Low
- Manual Reset with Bracket
- Mark II
- Motor Door Universal
- Non Fused Pullout
- Non-Fused 60AMP 240V
- Non-Insulated
- Old Style External J Box Mount
- On/Off
- Open 30DEG F
- Outdoor
- Overheat Eco
- Pan Overflow
- Plus Residential
- Potentiometer Automatic Reset
- Pressure Switch
- Prover 100110729
- Rear with Gasket for FB751-200
- Redundant Limit
- Refrigerant
- Repair Kit
- Replacement
- Replacement for 21 Series
- Replacement with Manual Reset
- Rollout
- SL8-5
- SL8-5A
- SPST
- SPST 0.40IN Water Column
- SPST 0.80IN Water Column
- SPST 0.8IN Water Column
- SPST 0.99IN Water Column
- SPST Close on Rise
- SPST Fuse Auto
- SPST Proving
- Secondary
- Spill 24V with Manual Reset
- Spill with Reset
- Suction
- Switch Conversion Kit
- Switch DPDT 2 Pole 50/60 Hertz
- TTW-12 for MITW
- TW50/75
- Temperature
- Temperature Blower
- Temperature Control
- Temperature ECO Limit
- Temperature ECO-12 Series
- Thermo High Manual Reset
- Thermo for Burner Door BNTH500 with CSD-1
- Thermodisc Flue ECO
- Timing Switch
- Upper
- Vent Blocked 200DEG F Setpoint
- Vent Blocked Manual Reset
- Water
- Water Heater Blower
- Water Hex Tee
- Water with Blue Dot
- Water with Gasket
- With Engagement/Overflow Switch
- With Limit
- With Screw
- Xylem PSE801 with Harness and Probe
- with Sensing Tube
Size
Switch Action
- 140 Open 100 Close Auto Reset
- 140 Open 110 Close
- 140 Open Manual Close
- 145 Open 105 Close
- 150 Open 110 Close Auto Reset
- 150 Open 120 Close
- 160 Open 130 Close
- 170 Open 110 Close
- 190 Open Manual Close
- 195 Open 130 Close
- 210 Open 180 Close
- 26 Open 38 Close
- 370 Open Manual Close
- 55 Open/45 Close
- 60 Open 70 Close
- 65 Open 75 Close
- 70 Open 80 Close; SPST
Switching Action
Temperature
Used on
- 1 Stage Natural Gas Furnace
- 105-138 Bod; 069-154 Bol; 072-154 Bom
- 2 Stage Natural Gas Furnace
- 2 Stage Variable Speed Upflow High Efficiency Natural Gas Furnaces
- 431FA/263FA/431WTA
- 7956; 7966; 7975; 7995
- 80M/140M/199M
- ALP080-210 Boilers
- All Models
- Alpine 80-105
- Aspen
- BDP/PDP
- CB045
- CGi-2.5-3-4 Series 1
- CH/NCB Model
- CLQS1-100T
- CLQSQ-075
- CMA/CMC/GMD1 Gas
- CMA/CMC1/GMD1 Gas
- CMA1-50/CMA3-50/CMC1-50
- CMA2-75/CMA3-75/CMC1-75
- Coleman and Evcon Equipment
- Condenser Fan Motors Electrical Box
- Condensing Upflow Natural Gas Furnaces
- DAYA-F048N135C; DAYH-F060N110C
- DF072 6TON R-22 Medium Efficiency
- DGAA 056-090; DGAH 056;077; DGAM 056;077; DGAT 056-090; DGPA 090; DGPH 090; DLAS 056;075
- DGAA 056; 070
- DGAT; DLAS Gas Furnace Igniters
- Downflow/Horizontal Gas Furnaces
- Downflow/Horizontal Gas Furnaces-90%
- E/Q Series
- E110CN/CP E75CN/CP
- E50C
- EZ Gas Burner
- EZ Gas Burner Pro Series
- Electric Heat Kits
- Elite Boilers
- Elite FT
- FTX500
- FTX600-850
- Freedom and CHG Series Boilers
- GA124/17
- GA124/23
- GA244/37
- GA244/44
- GB142 Series
- GMD1 Gas Furnace
- GV
- GV90+
- Gas Control
- Gas Fired Boilers
- HD75
- HE-Series 3 HE-II Series 3-4-5
- HE-Series 3 HE-II Series 3-5
- HSJ; UC1; HSUL-J ; HST-J; HS115-J; HS1; HSUL-1; HST-1; HS115-1; Side Wall Power Venters
- HVACR Equipment
- HW Series Boilers
- Heating
- Heating Applications
- Heating Series WB
- K2WT-180B 180WTC
- K2WT80-180B
- KB601-801
- KBN500-800
- MC50/80/99/120
- MFTCW140
- Model BTH; SUF Series 970 Commercial
- Model EF60T125 E/N/X 2/EF60T125 E/NA/XA 2
- Model SSB
- Modulating Multi-Position Natural Gas Furnaces
- Multilevel Control
- NKC 110/150/199
- Natural Gas Furnace
- OMC Oil
- OMC/OMD
- OMD Oil
- OME Oil Furnace
- PBLU Upflow Natural Gas Furnaces
- PD150/175/300/350/BD150/175/300/350
- PD250/30/50/BD50/250
- PTUHB; G8C ALL
- Pennant / Mighty Therm II
- Pennant Pool Heater
- Range Hood Universal Automatic
- Refrigeration
- SS2; SS2G Side Wall Vent Systems
- SSB-512
- SSB85-SSB160
- Series 61/64/67/69/70
- Series 93; 193; 94 and 194 Combination Low Water Cut-Offs/Pump Controllers
- Series Greentherm
- T/EL/ELP
- T/EL/EP/ELP
- T/MC/EL/EP/ELP
- T50M/80M/140M/199M/399M/MC
- TTW1-10's
- Thermostats
- VHE Series 2
- WGO Series
- WH110/155
- Water
- YPC9
Voltage
Committed to customer satisfaction
as experts in Safety Switches
Recently Viewed
Popular Products
View all →
NGR02-BBA | Gas Regulator | 3/4" NPT | 1/4" Orifice | Green Spring 6.5"-16"wc | Norgas Controls
Brand: Norgas Controls
SKU: NGR02-BBA
BA/10K-2-H210-D-BBX | Duct Humidity (%RH) Sensor with Optional Temperature Sensor | BAPI
Brand: BAPI
SKU: BA/10K-2-H210-D-BBX
N5D-1500-S | GAS REGULATOR 1-1/2" NPT 7-11"WC CSA | Norgas Controls
Brand: Norgas Controls
SKU: N5D-1500-S
ZPS-ACC04-1 | Room Pressure Pickup Ports with Temperature Sensor | BAPI
Brand: BAPI
SKU: ZPS-ACC04-1
B214 | Characterized Control Valve (CCV), 1/2", 2-way | Belimo
Brand: Belimo
SKU: B214
EPRC1501-NL | 1-1/2" X 1" F1807 PEX Reducing Coupling Lead Free | Everflow
Brand: Everflow
SKU: EPRC1501-NL