For fast field checks of various sensor types (inductive, capacitive, photoelectric and ultrasonic) 10 to 30 V. Suitable for PNP and NPN devices, N.O. and N.C. versions Automatic PNPNPN recognition LED and acoustic indicators Built-in steel target (non-standardized) for checking inductive sensors Power supply from a single 9 V battery (type IEC 6LR61) LED battery-state indication Built-in step-up voltage converter Automatic switch off after approx. 30 sec of non-use