Transmitter specification: Scope of application: PVC pipe, plastic pipe, Cement pipe, Iron pipe, metal pipe Signal Length: NF-5120: 20m NF-5130: 30m NF-5140: 40m Working frequency: 300Hz Work hours: 10H Working temperature: 0-40? Power supply: 3.7V,2600mAh Receiver Specification Distance Range: 0-60cm (Metal pipe), 0-15cm (Non-metal pipe) Sensitivity adjust: YES Working frequency: 300Hz Work hours: 20H Power supply: 3.7V,1400mAh Pack: 1*Transmitter, 1*Receiver Sensitivity Adjustment According to the actual measurement situation, you can properly adjust the sensitivity to make the detection more accurate. The more the signal light is on, the closer the distance to the blockage. Widely Used Utility line detector can be applied to metal pipes, PVC pipes, plastic pipes and other materials. Whether it is a family residence, or commercial office, shop, etc., the underground water line detector can be used to accurately find the water pipe blockage. Improve Efficiency This pipe blockage detector using the principle of electromagnetic induction and a sensitive sensor head can precisely locate the blockage, which greatly improves efficiency, reduces disassembly area and reduces costs. Strong Signal Penetration The signal of this pipe blockage detector can pass under the concrete wallfloor of 15.7inch thickness, which can precisely locate the pipe blockage and reduce the removal area. Emitter Probe SelfTest Function After power on, this pipe clogging detector can automatically detect whether the probe can operate normally and issue alerts disconnection a shorter alarm; short two alarms; normal operation a long one alarm to improve efficiency.