Sensors Limit switches and sensors Category
We have 9,000+ sensor models in our stock for your next building automation project. Duct, pipe, indoor and outdoor sensors: Blackhawk Supply has it all! Shop today!
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![Image for Outside Humidity Sensors](http://blackhawksupply.com/cdn/shop/collections/Outdoor-AIr_14_73e889d9-72c0-49a8-b7aa-3244a6177a9a_600x600_1_100x.png?v=1525965672)
![Image for Duct Humidity Sensors](http://blackhawksupply.com/cdn/shop/collections/RH_20TT_20Duct_NEMA_204X_0_5bf3c77c-eba9-4c1b-9243-8a07e6d427b1_600x600_1_100x.png?v=1525965556)
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![Image for Strap Sensors](http://blackhawksupply.com/cdn/shop/collections/GD-Strap_9_400x400_57c7c3ea-2a95-4273-b5f6-e4645a3b86e7_100x.png?v=1612451756)
![Image for Light/LUX Sensors](http://blackhawksupply.com/cdn/shop/collections/Light_20Level_0_1af9652e-abdf-4a24-b6e3-4f3023e7e2bf_600x600_1_100x.png?v=1525966099)
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![Image for Water Leak Detection](http://blackhawksupply.com/cdn/shop/collections/WD_PIC_1200x1200_ff2b53d6-6d0b-4a7c-9a53-05c5ea36409c_100x.jpg?v=1633683366)
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![Telemecanique 9038AG1 Mechanical alternator, Pumptrol, mech open tank, NEMA 1, pedestal mounted, 4 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9038ag1_medium.png?v=1712073245)
9038AG1 | Mechanical alternator, Pumptrol, mech open tank, NEMA 1, pedestal mounted, 4 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9038AG1
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![Telemecanique 9038AG1N4 Mechanical alternator, Pumptrol, mech open tank, NEMA 1, pedestal mounted, 4 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9038ag1_080ab06c-30e1-4862-9800-7718308467b1_medium.png?v=1712073246)
9038AG1N4 | Mechanical alternator, Pumptrol, mech open tank, NEMA 1, pedestal mounted, 4 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9038AG1N4
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![Telemecanique 9038AR1 Mechanical alternator, Pumptrol, mech open tank, NEMA 7/9, pedestal mounted, 4 NC DPST DB | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9038ar1_b7727461-4c09-4202-b666-5ae8101e92b8_medium.png?v=1712073250)
9038AR1 | Mechanical alternator, Pumptrol, mech open tank, NEMA 7 / 9, pedestal mounted, 4 NC DPST DB | Telemecanique
Brand: Telemecanique
SKU: 9038AR1
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![Telemecanique 9037HW30Z20 Float switch, Pumptrol, closed tank, NEMA 4, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037hr30_cb411799-0c9b-41be-bea7-1d5732d7e753_medium.png?v=1712073243)
9037HW30Z20 | Float switch, Pumptrol, closed tank, NEMA 4, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HW30Z20
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![Telemecanique 9037HW35 Float switch, Pumptrol, closed tank, NEMA 4, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037hr30_6a92f94d-7640-4b4d-b4af-e33c6d3144f8_medium.png?v=1712073243)
9037HW35 | Float switch, Pumptrol, closed tank, NEMA 4, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HW35
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![Telemecanique 9038AW1N5 Mechanical alternator, Pumptrol, mech open tank, NEMA 4, pedestal mounted, 4 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9038ar1_medium.png?v=1712073244)
9038AW1N5 | Mechanical alternator, Pumptrol, mech open tank, NEMA 4, pedestal mounted, 4 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9038AW1N5
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![Telemecanique 9037HW33 Float switch, Pumptrol, closed tank, NEMA 4, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037hr30_31cc9322-8616-463d-94d8-ceb26f23da1f_medium.png?v=1712073243)
9037HW33 | Float switch, Pumptrol, closed tank, NEMA 4, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HW33
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![Telemecanique 9037HW34 Float switch, Pumptrol, closed tank, NEMA 4, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037hr30_0b678f5b-6d12-454c-b9cf-332bdc169eb8_medium.png?v=1712073245)
9037HW34 | Float switch, Pumptrol, closed tank, NEMA 4, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HW34
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![Telemecanique 9037HR33 Float switch, Pumptrol, closed tank, NEMA 7/9, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037hr30_4ba5750e-b1b0-48f9-a6e0-f4853b28089e_medium.png?v=1712073244)
9037HR33 | Float switch, Pumptrol, closed tank, NEMA 7 / 9, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HR33
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![Telemecanique 9037HG34 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_23ebf248-0c92-4460-bfc3-90a1f2380abc_medium.png?v=1712073242)
9037HG34 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG34
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![Telemecanique 9037HG36 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_54d94413-7ae7-4c66-a6db-48440bcb3d97_medium.png?v=1712073237)
9037HG36 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG36
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![Telemecanique 9037HG39 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_b7cde354-4780-40b9-94d4-e59901c063ae_medium.png?v=1712073241)
9037HG39 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG39
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![Telemecanique 9037HG37 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_dbc5d3b2-b8cf-4224-a15c-34081de9a1f6_medium.png?v=1712073239)
9037HG37 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG37
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![Telemecanique 9037ER9 Float switch, Pumptrol, closed tank, NEMA 7/9, flange mounted, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037er9_04523e7f-000c-4bc3-8a1d-b951f6bc1bf8_medium.png?v=1712073239)
9037ER9 | Float switch, Pumptrol, closed tank, NEMA 7 / 9, flange mounted, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037ER9
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![Telemecanique 9037HG32LZ20 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037hg32lz20_medium.png?v=1712073241)
9037HG32LZ20 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG32LZ20
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![Telemecanique 9037HG33R Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NO DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_76395424-7e5d-45eb-8b7f-6ea398f416cf_medium.png?v=1712073239)
9037HG33R | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NO DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG33R
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![Telemecanique 9037HG38 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_b89ab92a-5f7b-4f49-a359-5ce3ae2f1103_medium.png?v=1712073237)
9037HG38 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG38
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![Telemecanique 9037HG33 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_4e6fcd91-619d-47cb-9c70-f97e138c53ec_medium.png?v=1712073236)
9037HG33 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG33
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![Telemecanique 9037HG32Z20 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037hg32z20_medium.png?v=1712073238)
9037HG32Z20 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG32Z20
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![Telemecanique 9037HG30R Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NO DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_d2c1c633-d719-4687-8873-2c085b9cf8cc_medium.png?v=1712073236)
9037HG30R | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NO DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG30R
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![Telemecanique 9037HG30 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_8928ec0b-1514-4929-9aaa-3c60b06851d0_medium.png?v=1712073239)
9037HG30 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG30
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![Telemecanique 9037HG32L Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037hg32l_medium.png?v=1712073239)
9037HG32L | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG32L
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![Telemecanique 9037HG32 Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9007bt3_746ae45f-fe0d-425e-9963-ffb5b0572d45_medium.png?v=1712073239)
9037HG32 | Float switch, Pumptrol, closed tank, NEMA 1, screw in bushing, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037HG32
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![Telemecanique 9037EG9 Float switch, Pumptrol, closed tank, NEMA 1, flange mounted, 2 NC DPST DB contacts | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/9037eg10_9d36f426-ab6a-420e-927c-0dff976cf47d_medium.png?v=1712073236)
9037EG9 | Float switch, Pumptrol, closed tank, NEMA 1, flange mounted, 2 NC DPST DB contacts | Telemecanique
Brand: Telemecanique
SKU: 9037EG9
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SGVL+SVKB24-SR | SGVL w/ Electronic FS | 337 lbf | 24V | 2-10V | Belimo
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