The sensor tester is designed to test two-, three- or four-wire DC sensors with PNP or NPN outputs.<br> Capable of testing inductive (metal induction), capacitive, optoelectronic, magnetic or ultrasonic.<br> Sensor testers allow users to quickly and confidently check sensor operation, avoiding unnecessary replacements and adding fault-finding capabilities.<br> The tester is portable and can only use 2 6F22 9V batteries (Included/Battery Not Included)<br> Application:Optoelectronic/Proximity/Magnetic/Fiber Amplifier<br> Type:B:With Battery/A:Without 2 x 9V Battery<br> Colour:Black<br> Material:Plastic<br> Size:93x60x23mm<br> Package Contents:<br> 1 x Photoelectric Switch Tester<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.