Sierra Instruments” is offering a two-year warranty for its entire line of Innova-Switch Flow Level Switches. The switches are designed to meet broad range of performance and environmental application requirements. The sensor and other wetted materials are 316L stainless steel and feature all welded construction with no moving parts. Flow and level detection is accomplished by using a high-resolution thermal differential technique. The sensor consists of a pair of matched resistance temperature detectors (RTD”s). One RTD is self-heated using a constant DC current. The other RTD is unheated and provides an accurate process temperature reference. The thermal differential created between the reference and the heated RTD pair is a function of the density and/or velocity of the gas/fluid in contact with the sensor. The switch features an operating temperature range of -100 F to 850 F (-70 C to 458 C) and a range of 0.01 to five feet per second (fps) in liquids and 0.1 to 500 FPS gases. The level sensitivity is 0.03 inch. The meter features an adjustable response time of 0.5 to 10 seconds (media dependent). The switch is also CE and CSA approved.