Improved design, simple hydrostatic tank contents gauge. Accuracy +/‑ 2%.Suitable with diesel, biodiesel, oils, water & AdBlue®.Readout dial can be sited up to 20m away from tank.Dual ½” & 1” M BSPP tank adaptor. Integral wall mounting holes.Shows percentage of full content.One version suits tanks from 0.9m to 3.0m high.Simply pull the plunger & release to show current contents.Calibrate on site to suit your particular tank.Above or below ground tanks. Dial face for rectangular/cylindrical tanks.Weatherproof unit suitable for outside mounting.303 stainless steel weight on tank probe.