duct humidity sensors
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![Dwyer HS-112 Humidity switch | 0-1 V input sensor | 230 VAC supply voltage. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/hs_600x600_b25cb527-c872-4b89-8dd8-9576de9bc3c6_medium.gif?v=1719999253)
HS-112 | Humidity switch | 0-1 V input sensor | 230 VAC supply voltage. | Dwyer
Brand: Dwyer
SKU: HS-112
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![Dwyer 657-1 Relative humidity/temperature transmitter. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/657-657c_family_1000x1000_962a8657-10ba-48a1-bf34-10d4c78a346c_medium.jpg?v=1719998030)
657-1 | Relative humidity / temperature transmitter. | Dwyer
Brand: Dwyer
SKU: 657-1
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![Dwyer 3868-0140 Open heater detector | logic output | no LED | 4 ft (1.2 m) cable. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/3868_medium.jpg?v=1719997739)
3868-0140 | Open heater detector | logic output | no LED | 4 ft (1.2 m) cable. | Dwyer
Brand: Dwyer
SKU: 3868-0140
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![Johnson Controls C450CCN-3C CONTROL MODULE 2 STAGE; CNTRL MOD W/LCD 4 BUTTON TOUCHPAD UI&RELAY OUTPUT PROVIDES 2 RELAY OUTPUT | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/logo_jci1_223aa58d-e391-40fb-a50e-0d37574fa7a0_medium.jpg?v=1719992764)
C450CCN-3C | CONTROL MODULE 2 STAGE; CNTRL MOD W / LCD 4 BUTTON TOUCHPAD UI&RELAY OUTPUT PROVIDES 2 RELAY OUTPUT | Johnson Controls (OBSOLETE)
Brand: Johnson Controls
SKU: C450CCN-3C
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![Resideo 50045729-001 REPLACEMENT BLOWER AND MOTOR FOR TRUEEASE FAN POWERED HUMIDIFIER. HE300. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/50045729-001-3_medium.jpg?v=1719990720)
50045729-001 | REPLACEMENT BLOWER AND MOTOR FOR TRUEEASE FAN POWERED HUMIDIFIER. HE300. | Resideo
Brand: Resideo
SKU: 50045729-001
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![Honeywell 14004406-910H DISTAT COVER 15 TO 75% RH SATIN CHROME WITH SET OF 4 VERTICAL AND HORIZONTAL MOUNT SCALE PLATES | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/Honeywell-logo_0cbc600e-8097-4cb7-8fd3-2c5c0274d44d_medium.png?v=1719990628)
14004406-910H | DISTAT COVER 15 TO 75% RH SATIN CHROME WITH SET OF 4 VERTICAL AND HORIZONTAL MOUNT SCALE PLATES | Honeywell
Brand: Honeywell
SKU: 14004406-910H
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![Honeywell 14004406-224 HUMIDISTAT COVER, SATIN CHROME, SETPOINT 15-75% DISPLAY ONLY, HORIZONTA L MTG, SLOT OPEN. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/Honeywell-logo_261493dd-0c5c-477d-80c6-9308f258294f_medium.png?v=1719990608)
14004406-224 | HUMIDISTAT COVER, SATIN CHROME, SETPOINT 15-75% DISPLAY ONLY, HORIZONTA L MTG, SLOT OPEN. | Honeywell
Brand: Honeywell
SKU: 14004406-224
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![Belimo EXT-OP-5525 Replacement Sensor Module | RH (0…100% RH) | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/PIC_AM_EXT-OP-5525_4C-product_medium.jpg?v=1719985600)
EXT-OP-5525 | Replacement Sensor Module | RH (0…100% RH) | Belimo (OBSOLETE)
Brand: Belimo
SKU: EXT-OP-5525
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![ACI WH2630A-300 WLS, RH3%, ROOM, 300SEC | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/aci-wh2630a-300_43905281-a17a-4785-8917-66ce3fbe0225_medium.png?v=1719983208)
WH2630A-300 | WLS, RH3%, ROOM, 300SEC | ACI
Brand: ACI
SKU: WH2630A-300
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![ACI BN2110-INW-4-PB BACnet MS/TP, Modbus RTU, Temperature, Immersion No Well, 4", Plastic Enclosure | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/aci-bn2110-inw-2-5-pb_ac99844b-50c4-4678-aa45-fcd806ed8827_medium.png?v=1719983019)
BN2110-INW-4-PB | BACnet MS / TP, Modbus RTU, Temperature, Immersion No Well, 4", Plastic Enclosure | ACI
Brand: ACI
SKU: BN2110-INW-4-PB
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![ACI A/RH3-TT1K-D-4X-2 DUCT, 2G 4X, 3% | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/aci-a-rh1-ttm100-d-4x-4_c5a9cf45-4982-4d8b-be0e-e19d9e18a831_medium.png?v=1719982624)
A / RH3-TT1K-D-4X-2 | DUCT, 2G 4X, 3% | ACI
Brand: ACI
SKU: A/RH3-TT1K-D-4X-2
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![ACI A/RH5-R-LCD-420 TUCH2, RH5% | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/aci-a-rh3-r-lcd-010-nist_2dd96454-fe2a-4995-8677-97e529a1d2fa_medium.png?v=1719982628)
A / RH5-R-LCD-420 | TUCH2, RH5% | ACI
Brand: ACI
SKU: A/RH5-R-LCD-420
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![ACI A/RH3-TTM1K-O-4X-4 OUTSIDE, 2G 4X, 3% | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/aci-a-rh2-tt100-o-4x-4_58fc1fad-74f4-4edb-b516-4fd06a670061_medium.jpg?v=1719982603)
A / RH3-TTM1K-O-4X-4 | OUTSIDE, 2G 4X, 3% | ACI
Brand: ACI
SKU: A/RH3-TTM1K-O-4X-4
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![ACI A/RH5-20K-D DUCT, EH, 5% | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/aci-a-rh2-1k-2w-d-nist_16456449-b4de-4073-9785-92348ab9ce62_medium.jpg?v=1719982604)
A / RH5-20K-D | DUCT, EH, 5% | ACI
Brand: ACI
SKU: A/RH5-20K-D
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![ACI A/RH5-D-BB DUCT, BB, 5% | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/aci-a-rh3-100-2w-d-bb_2885704a-6d3d-43c4-b496-b9a2c659be97_medium.png?v=1719982584)
A / RH5-D-BB | DUCT, BB, 5% | ACI
Brand: ACI
SKU: A/RH5-D-BB
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