Duct humidity sensors Ma or vdc output Element type
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![Siemens QFM81.2 Duct Hygrostat with External Setpoint, 30 - 90% RH | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/QFM81.2_79d4079b-70ec-46dd-ad55-c21dcc811194_medium.jpg?v=1720023785)
QFM81.2 | Duct Hygrostat with External Setpoint, 30 - 90% RH | Siemens
Brand: Siemens
SKU: QFM81.2
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![Siemens QFM3101 Duct Relative Humidity Sensor, 2 percent accuracy, 4-20 mA | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/QFM3101_medium.jpg?v=1720023804)
QFM3101 | Duct Relative Humidity Sensor, 2 percent accuracy, 4-20 mA | Siemens
Brand: Siemens
SKU: QFM3101
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