The E+H Micropilot NMR81 Radar Transmitter is used for custody transfer and inventory control applications with NMi and PTB approvals and meets the requirements according to OIML R85 and API 3.1B. The NMR81 is particularly suited for free space applications up to 70m. The drip-off lens antenna with 80 GHz transmitting frequency produces a sharply focused beam angle of 3° and avoids obstacles even close to tank wall.