outside humidity sensors
![Veris HO3XMSX RH Outdoor | 3% | 4-20mA | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/HO3XMSX-T1_25da0846-1707-4897-8963-dafc85174774_medium.png?v=1712258130)
![Siemens QFA32SS.EWSN Humidity&Temp Room Unit, 2%, selectable RH&T, White, Siemens Logo, No Comm | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/QFA32SS.EWSN_medium.jpg?v=1715806956)
![Mamac HU-225-3-VDC 0-10VDC | Room Zone Wall RH Humidity Sensor | 3% Accuracy | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/HU-225-3-VDC_medium.png?v=1713900903)
![Siemens 544-578 Outside Air Temperature Sensor, 1K Ohm Platinum (385 alpha) | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/544-578_medium.jpg?v=1715195295)
![Siemens QAC3161 OUTDR TMP SNSR, 0-10V, -58-122F, PLASTIC | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/QAC3161_medium.jpg?v=1718290293)
![Veris TOAV10 Temp | Outdoor | Xmtr | 5/10V | -58 to 122F | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/TOAV10_medium.jpg?v=1706643799)
![Veris TOAM10 Temp | Outdoor | Xmtr | 4-20mA | -58 to 122F | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/TOAM10_medium.jpg?v=1715120630)
![Senva Sensors CT1O-A3D CO2 OUTDOOR LCD NOTEMP | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/Senva_Family_CT1O_7c20c883-9abb-48a3-8755-5c448569405d_medium.jpg?v=1712258627)
![Siemens QAC3171 OUTDR TMP SNSR, 4-20mA, -58-122F, PLSTIC | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/QAC3171_medium.jpg?v=1711135291)
![Mamac HU-227-3-MA-3 Temp & RH 3% | Temp: 1000 ohm RTD | RH: 4-20mA | Outdoor Outside Air Temp & Humidity Sensor | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/HU-227-3-MA-3_medium.png?v=1713900830)
![Belimo 22DTH-51M Duct Temp+Hum Sensor V | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/PIC_AM_22DTH-5.._01_4C-product_retina_medium.jpg?v=1714682057)
![Siemens 536-768 Outside Air Temperature Sensor, Through-the-wall, 4 to 20 mA | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/536-768_medium.jpg?v=1692720399)
![Veris HEW3VSTH RH/T | Economy | Wall | 3% | 0-10 | 10k T3 | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/HEW2MSTA_8e28368c-cd3e-451b-853b-facf470851f0_medium.jpg?v=1689084070)
![Mamac HU-226-3-VDC-12 Temp & RH 3% | Temp: 10K Type II | RH: 0-10VDC | Duct Temp & Humidity Sensor | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/HU-226-3-VDC-12_medium.png?v=1713900932)
![Belimo 22UT-54 Outside Temp Sensor A MULT | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/PIC_AM_22UT-5.._01_4C-product_retina_medium.jpg?v=1714682103)
![Belimo 22DTH-56M Duct Temp+Hum Sensor BAC | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/PIC_AM_22DTH-55M...56M_01_4C-product_retina_medium.jpg?v=1714682128)
![Veris HEW3VSTC RH/T | Economy | Wall | 3% | 0-10 | 1k Pt | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/HEW2MSTA_4c3d7ffc-5744-4eb3-9aba-ebbefd17ddec_medium.jpg?v=1689084047)
![Veris HD3XVSX RH Duct | 3% | 5/10VDC | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/HD3XVSX_46f49c62-dce1-480d-a864-b39bdf20237f_medium.jpg?v=1689084034)
![Belimo 22UTH-53 Outside Temp+Hum Sensor A | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/PIC_AM_22UTH-5.._01_4C-product_retina_ebd58ae5-a2e5-403d-8d50-9b5756c04f58_medium.jpg?v=1714682113)
Choose from 80 different outside humidity sensors for your next HVAC project.
Controlling the outside humidity that comes into your HVAC system is just as important as managing the humidity in your air ducts and rooms.
By monitoring the humidity outside your building, you control the process of how much moisture flows into your building. That is a crucial component to keeping the temperature inside your home or office stable.
Blackhawk Supply ensures you get the right amount of moisture into your building. We offer 80 different outside humidity sensors from manufacturers like ACI, Mamac, and Veris.
All our temperature and humidity sensors are accurate up to ±3% differential.
The sensor uses either a Resistance Temperature Detector (RTD) or thermistor signal to measure the temperature and humidity.
Both the RTD and the thermistor work with DC and AC power to notify the HVAC system of the amount of humidity outside the building.
Furthermore, all our outdoor humidity sensors are rated NEMA 4. That means their enclosures protect your electrical devices outside from rain, dirt, sleet, snow, dust, and water.
If you need a more secure outside humidity sensor, consider ACI’s A/ RH3-CP-O-4X. The model is the only sensor that offers a NEMA 4X Housing Enclosure Box for a higher level of protection from outside environments.
The NEMA 4X not only protects against the elements discussed above but also protects the sensor from corrosion.
Do you need help finding the best outside humidity sensor?
Measuring the relative humidity of your outdoor area is a vital component of a smooth-working HVAC system. If you need help finding the best control sensor for your next project, let us know how we can help you.
Contact Blackhawk Supply today, so we can answer your outdoor humidity sensors questions.Popular Products
View all →![Siemens 147-2000 Positioning Relay, Pneumatic, Adj Start Point and Span, Rapid Response | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/147-2000_large.jpg?v=1692718555)
![Veris E51C2 Bi-Directional DIN Energy Meter | Modbus | Pulse Out | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/E50B1_70e18f65-76e2-427f-9c7b-27c5972f675a_large.jpg?v=1692624158)
![Graco D11021 Husky 205 AC Pump, PP Center Section, AC Balls & PTFE Diaphragm | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/D11021-Graco-Husky-205-Plastic-Air-Operated-Double-Diaphragm-Pump-486320_4b7f4380-0c81-46cf-8733-e0bb3b70723d_large.jpg?v=1705596867)
![Schneider Electric MA-418-500 Act (MA-418-500): Elec, 2Pos, SR, 120 VAC, TB, 60 in-lb, Rotary, Auxiliary Switch: 1 SPDT, N1, Erie | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/MA-4_cbeba398-a3d0-4c4f-abe5-f01c00c8509e_large.jpg?v=1717434807)
![Schneider Electric MA-418 Act (MA-418): Elec, 2Pos, SR, 120 VAC, TB, 60 in-lb, Rotary, N1, Erie | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/MA-4_75a7c8e4-57d8-49e5-bf53-2eee7144aafc_large.jpg?v=1717434806)
![Contemporary Controls EIS8-100T 8-Port 10/100Mbps UL-864 EIS Switch | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/eis_b407f1fa-ba1e-409c-8dfb-75529d660c8a_large.jpg?v=1708892842)
![Neptronic SHS80-C Duct Mnt Humidity/High Limit | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/SKE4-SKS4_SHS80_d0f055ef-aed4-412c-bac8-68bfbd0ae0f2_large.png?v=1717516288)
![Functional Devices RIBW01B-EN3 EnOcean 902 Mhz Enclosed Relay 20Amp 120Vac 2-Way Wireless Dry-Cont. Input | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/RIBW01B-EN3_3ae477a4-560b-44f1-8b78-fb44c6bca52d_large.jpg?v=1708365190)