So called ullage tape.  Made of steel or stainless steel with a chromed brass drawing weight attached.  Metric or metric and inch graduated tapes are available.  The tapes are mounted to a strong frame with a wooden carrying handle.  Tapes of lengths up to 50 mtr are also available upon request.

量油尺也叫测深尺。由钢或不锈钢制成，附有镀铬黄铜拉丝砝码。提供公制或公制和英制刻度带。磁带用木制提手固定在坚固的框架上。如有要求，还可提供长度达50米的尺带, 量油尺专量油矿、油井，油轮等深度,由手柄、尺架、摇柄、量尺、尺砣、锁定器、刮油器、支架、连接器构成,量尺的刻度方向朝向手柄。锁定器利用锁定开关、销钉和弹簧,可将量尺锁柱定位,刮油器悬挂在尺架上的定滑轮上,量尺从刮油器的毛毡中穿过,将测量时沾附的油液刮净 ，可配合试水膏和试油膏使用,根据尺带颜色的变化,判断测量物质的深度。