The Fill-Rite 800 Series Meter Range, from GO Industrial, is a three wheel mechanical meter for fuel transfer. A nutating disc chamber counts the fluid as it passes, so there is no power supply, no battery and nothing electronic to fail. The three digit counter reads the batch up to 99.9 litres and zeroes from the knob on the side, and a separate non-resettable totaliser holds throughput for the life of the meter. Four builds cover most inline work. The 807CL takes 3/4 inch BSP ports and the 807CL1 takes 1 inch. The 806CL is the gravity feed model and carries an inlet strainer on top, for tanks that feed by head rather than by pump. The 807CNL1 is nickel plated, which is the build to use on higher biofuel blends. All four are litre register, rated to 50 psi and accurate to plus or minus 1 percent. The body is cast aluminium and the ports rotate to any of four positions, so one meter suits horizontal or vertical pipework. Calibration is a screwdriver job against a container of known volume. The faceplate is marked not to be used to measure liquid for resale, so these record your own usage rather than serving as trade measurement.