rod level

rod level

[′räd ‚lev·əl]
(engineering)
A spirit level attached to a level rod or stadia rod to ensure the vertical position of the rod prior to instrument reading.

rod level

An accessory for use with a leveling rod or a stadia rod to assure a vertical position of the rod prior to instrument reading.
References in periodicals archive ?
The highest ROD level obtained by Bank BJB Syariah in 2015 amounted to 11.06% while the smallest ROD level of Maybank Syariah Bank in 2012 amounted to 2.47%.
Tenders are invited for Fuel Glow Rod Level Gauge Assembly For Wdm3d Locomotives.
Basically, with the rod butt wedged in your stomach, and keeping the rod level out over the water, a technique of slow, short but powered pulls--raising the rod about 15 degrees from the horizontal--followed by a quick drop and fast few turns of the reel to gain lost line--is the best.
The rod holder can control this error by using a rod level or by rocking the rod.