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

it includes a pre-attached threaded nut and a Tinnerman clip to ensure a secure fit and proper positioning within the flame path

Constructed with a 3/8-inch inlet and a 1/2-inch outlet

use a multimeter to check for 0 ohms across the terminals during operation

Enhanced Durability: High-grade stainless steel construction resists corrosion and scoring

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