Armstrong International A8581 Humidistat Els PW 17895 if the reading is consistently

if the reading is consistently below 20-25 mV while the tip is engulfed in a blue flame

Is this a standing pilot or a spark ignition assembly

making it a staple for clean rooms

providing a ruggedized solution for commercial heating systems and process ovens

Armstrong International A8581 Humidistat Els PW 17895 if the reading is consistentlyThe Armstrong International A8581 Humidistat (also known as the A 8581) is a high performance on off high limit duct humidistat designed for precise safety and control in industrial and commercial HVACR applications. Engineered as a duct mounted high limit stat, this unit is specifically recommended to prevent localized saturation and downstream condensation within air handling systems. It serves as a critical safety component, typically set at 85% RH