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.

量油尺也叫測深尺。由鋼或不銹鋼制成，附有鍍鉻黃銅拉絲砝碼。提供公制或公制和英制刻度帶。磁帶用木制提手固定在堅固的框架上。如有要求，還可提供長度達50米的尺帶, 量油尺專量油礦、油井，油輪等深度,由手柄、尺架、搖柄、量尺、尺砣、鎖定器、刮油器、支架、連接器構(gòu)成,量尺的刻度方向朝向手柄。鎖定器利用鎖定開關(guān)、銷釘和彈簧,可將量尺鎖柱定位,刮油器懸掛在尺架上的定滑輪上,量尺從刮油器的毛氈中穿過,將測量時沾附的油液刮凈 ，可配合試水膏和試油膏使用,根據(jù)尺帶顏色的變化,判斷測量物質(zhì)的深度。