Duct Humidity Sensors by Siemens

View Details QFM3171D | DUCT RH & TMP SNSR, 4-20mA, 2%, DISPLAY | Siemens
$211.34 each
View Details QFM81.21 | Duct Hygrostat, 30 to 90% RH | Siemens
$131.17 each
View Details QFM3160D | DUCT RH & TMP SNSR, 0-10V, 2%, DISPLAY | Siemens
$211.34 each
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