Borehole Inspection Cameras

WLM 442 Water level meter is the new patented products, The new integrated circuit board design and development, With the function of polarization resistance excitation circuit and corrosion-resistant electrode to effectively prevent the electrode oxidation rust, keeping long-term sensitivity. Water level meter can be widely used in water conservancy project , hydrology, geography, environmental protection and other areas of industry and agriculture fields, The water level meter is made of the probe, steel ruler and reel .Put the probe to the water, slowly, when the probe touch the surface of water , the electric potential will be happened . After dealing by circuit board . the sound or light will be indicated , then you could check the height between the surface of the water to the ground , easily operating. Important note: This product is available in several versions and each version has its own price, so if you want to buy this product online, you have to choose the scale length that you want to purchase. Scale length: 50 m, 100 m, 150 m, 200 m, 300 m, 400 m, 500 m