Rosemount Analytical Model 3900 pH/ORP Sensor SMART pH Sensors | Instrumart

Shop Now: http://www.instrumart.com/products/34... The Rosemount Analytical 3900 and 3900VP General purpose pH/ORP sensor models are provided with a double junction reference, which protects the reference element from poisoning ions -- such as ammonia, chlorine, cyanides, and sulfides -- in the process. The double junction reference aids in the sensor's resistance to harsh environments and helps prolong sensor life. Both models are made with porous Teflon® junction positioned near the pH/ORP-sensitive membrane.