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.
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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
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43350 | Pressure Switch SPST Close on Rise 1/4 Inch Female Flare 7 to 80 PSI | Mars Controls
Brand: Mars Controls
SKU: 43350
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43349 | Pressure Switch SPST Close on Rise 1/4 Inch Female Flare 5 to 60 PSI | Mars Controls
Brand: Mars Controls
SKU: 43349
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43348 | Pressure Switch SPST Close on Rise 1/4 Inch Female Flare 5 to 80 PSI | Mars Controls
Brand: Mars Controls
SKU: 43348
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43343 | Pressure Switch SPST Close on Rise 1/4 Inch Female Flare 5 to 25 PSI | Mars Controls
Brand: Mars Controls
SKU: 43343
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43342 | Pressure Switch SPST Close on Rise 1/4 Inch Female Flare 5 to 30 PSI | Mars Controls
Brand: Mars Controls
SKU: 43342
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
- Coleman and Evcon Equipment
- ES2 X-2 CGE AG
- FRHS 018-042
- 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
- 105 Open 120 Close
- 110/90 Open/Close Auto Reset
- 120/100 Open/Close Auto Reset
- 120/240 Volt
- 120/240V
- 130/100 Open/Close Auto Reset
- 140/100 Open/Close
- 140/110 Open/Close
- 140/110 Open/Close Auto Reset
- 145 Open 105 Close
- 145/115 Open/Close Auto Reset
- 150 Open 120 Close
- 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 Open 135 Close Auto Reset
- 165/135 Open/Close Auto Reset
- 170 Open Manual Close
- 170/120 Open/Close
- 170/140 Open/Close Auto Reset
- 175/145 Open/Close Auto Reset
- 180/150 Open/Close
- 180/150 Open/Close Auto Reset
- 180DEG F
- 185 Open 155 Close Auto Reset
- 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
- 230/200 Open/Close Auto Reset
- 255 Auto Reset
- 270 Open Manual Reset
- 280 Open 250 Close
- 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
- 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
- .05-12IN Water Column
- .85IN Water Column
- .90IN Water Column
- 0.10IN Water Column On Fall Single Pole Normally Open
- 0.15/0.35IN 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
- 0.25/0.40IN Water Column On Fall Single Pole Normally Open
- 0.30IN Water Column On Fall Single Pole Normally Open
- 0.35/0.65IN 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
- 0.55/1.30IN 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
- 0.65IN Water Column DUC
- 0.65IN Water Column On Fall Single Pole Normally Open
- 0.67IN Water Column On Fall Single Pole Normally Open
- 0.70/1.00/0.40IN Deact Normally Open
- 0.70/1.25IN Water Column On Fall Single Pole Normally Open
- 0.75/1.10/0.40IN Deact Normally Open
- 0.75IN Water Column
- 0.75IN Water Column On Fall Single Pole Normally Open
- 0.85IN Water Column
- 0.90/1.40/0.40IN Deact Normally Open
- 0.90IN Water Column
- 0.90IN Water Column On Fall Single Pole Normally Open
- 0.95IN 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
- 1.13IN Water Column
- 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
- 1.30IN Water Column On Fall Single Pole Normally Open
- 1.45IN Water Column On Fall Single Pole Normally Open
- 1.4IN Water Column
- 1.50IN Water Column
- 1.60/0.40 Deact Normally Open
- 1.60IN Water Column On Fall Single Pole Normally Open
- 1.70IN Water Column On Fall Single Pole Normally Open
- 1/2PSI
- 175 Open 95 Close
- 1IN Water Column
- 250PSIG
- 3 to 30PSI
- 400/300 Open/ClosePSIG
- 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
- 650/450PSIG
- 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
- A/R 150F Open/110F Close
- A/R 180F Open/150F Close
- Adapter
- Adjustable
- Air
- 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
- Air S1-02435778000
- Airflow
- Ambient
- 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 Drain
- 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
- DPST
- Differential
- Differential SPDT
- Door
- Drain Inducer
- Dual Air
- Dual Gas Control
- Dual Surface Mount
- Ducane
- Ducane Switch
- Dwyer A306 Sensor
- ECO
- Electric Replacement
- Electric with Manual Reset
- Exhaust Pressure
- Exhaust for EF60T125/150/199
- Fan 6 Terminal DPST
- Fan 85F Open/105F Close
- 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
- High
- High Altitude Kit S1-1PS0309
- 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
- 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 Manual Reset
- 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
- Lower
- MR170
- Main
- Manual Reset
- Manual Reset 176F Trip
- Manual Reset with Bracket
- Mark II
- Motor Door Universal
- Motor Protector with Terminal Board
- No Heater Switch
- Non Fused Pullout
- Non-Fused 60AMP 240V
- Non-Insulated
- Old Style External J Box Mount
- On/Off
- Open 30DEG F
- Overheat Eco
- Pan Overflow
- Plus Residential
- Potentiometer Automatic Reset
- Pressure Switch
- Prover 100110729
- Redundant Limit
- Refrigerant
- Repair Kit
- Replacement for 21 Series
- Replacement with Manual Reset
- Rollout
- S1-02632119001
- SL8-5
- SL8-5A
- SPDT
- SPDT 0.52IN Water Column
- 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 Control SPST
- Temperature ECO Limit
- Temperature ECO-12 Series
- Thermo High Manual Reset
- Thermo for Burner Door BNTH500 with CSD-1
- Thermodisc Flue ECO
- Timing Switch
- Toggle with Bracket DPST
- 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 Bracket DPST
- With Engagement/Overflow Switch
- With Limit
- With Screw
- Xylem PSE801 with Harness and Probe
- with Sensing Tube
Size
Switch Action
- 0 Open 15 Close
- 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
- 22 Open 37 Close
- 220 Open Manual 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
- 2CE; 2MH; 2HE Electric Heat Kits
- 2D; 4D; 4R; 6R; 4D; 6D Compressor
- 431FA/263FA/431WTA
- 7624/7665/7670/7680/7708/7710/7724
- 7956; 7966; 7975; 7995
- 80M/140M/199M
- AGU (050-100) BGM (050-150) G8C (100-150) GUA (050-100) GUB (050-100) L8C (1000-125)
- ALP080-210 Boilers
- All Models
- Alpine 80-105
- Aspen
- BDP/PDP
- BGM; GMB; UGA ALL G8C 075
- CGU 045-095; DGU 045-095
- 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-F018N045C; DAYA-F024N045C
- 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
- DGAD 060; DGU 060-120; FG9B 060-080; GUD 060-120; G9T Downflow 060-120; FG9D 100-120; P2DRB 12; P2URD 10-20; P3DHB 12-20; P3URB 10-12
- DGAM 056-075
- 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
- 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 Applications
- K2WT-180B 180WTC
- K2WT80-180B
- 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
- 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
- Water
- YPC9
Voltage
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