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新型的780/781数字式钻孔测量仪是把计算机技术与固体变送器的高精度和可靠性结合起来研制出的一种目前最灵敏、最简便的钻孔漂移测量工具。操纵台上的仪表始终跟踪钻孔进行测量。整个系统包括井下测量系统以及地面信息处理、数据记录和显示系统。基本技术规格如下：变送器外径：1~(1/2)″（38毫米）或1~(5/8)″（4毫米）标准长度：66″（168厘米），68″（173厘米）（781型）最大重量：18磅（8公斤）变送器电源：内部供电48伏直流，130毫安外管：奥氏体不锈钢（带有黄铜接线盒）
The new 780/781 digital borehole measuring instrument is a most sensitive and simple borehole drift measurement tool developed by combining computer technology with the high precision and reliability of solid state transmitters. The instrument on the console always tracks the borehole for measurement. The entire system includes downhole measurement systems as well as ground information processing, data recording and display systems. The basic technical specifications are as follows: Transmitter outside diameter: 1~(1/2)” (38mm) or 1~(5/8)” (4mm) Standard length: 66” (168cm), 68” (173 Cm) (Model 781) Maximum weight: 18 lbs (8 kg) Transmitter Power supply: Internally powered 48 VDC, 130 mA Outer tube: Austenitic stainless steel (with brass terminal box)