The Ranger Calibration Kit is a simple, easy-to-use adapter designed for calibrating your Aeroqual Ranger sensors. Choose the adapter alone, or include tubing for even easier calibration. This accessory allows you to span calibrate sensor heads while they remain attached to both Ranger and Series 500 monitors. With the exception of ozone, ammonia, and perchloroethylene, the kit is compatible with all other Aeroqual gas sensor heads.