This easy-to-use vacuum gauge with extendable coiled sensor cord allows you to place the sensor where you want and hold the control up to 24-in. away for easy readability. Patented thermal conductivity sensor handles 450 psi positive pressure, and automatically compensates for temperature. If it gets dirty, simply plug a new sensor into the gauge, do a quick calibration, and be back on the job in minutes. Simply push a button to change display readout between 7 units of vacuum, down to the equivalent of 10 microns of vacuum. Contact Ritchie Engineering, Yellow Jacket® Products Division, at www.yellowjacket.com/cb or phone 800/769-8370.