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Level Measurement. Liquid level measuring devices are classified into two groups: (a) direct method, and (b) inferred method. An example of the direct method is the dipstick in your car which measures the height of the oil in the oil pan.
Typical methods of Direct Level Measurement include: - Dipsticks, and Lead Lines. These measure the wetted length of a stick or "string" submerged in the liquid, - Sight Glass (also known as Level Glass, or reflex sight glass). These give visual indication of liquid level through a transparent window.
Dipsticks offer a simple means of measuring level approximately. The ordinary dipstick is the cheapest device available. This consists of a metal bar on which a scale is etched, as shown in Figure 17.1(a). The bar is fixed at a known position in the liquid-containing vessel.
Different Types of Level Measurement are Dip stick, Sight glass, Float, Buoyancy, Hydrostatic, ultrasonic, capacitance, Radar, Radiation based level sensors
Nov 21, 2016 · Level measuring devices are used to accurately measure the volume of fluid in containers on a continuous basis. Common level measuring instruments include level gauges, float devices, those that measure hydrostatic pressure, displacement type, echo type, and capacitive type.
Sep 25, 2017 · This document discusses different direct methods for liquid level measurement, including sight glass, float type, and hook-type level indicators. Sight glass uses a graduated glass tube to directly measure the liquid level in a tank.
A dip tape is a manual user-operated liquid level measurement device, which consists normally of some form of calibrated tape, for example, meters, feet, yards, with a weight attached to the end.
Since the late 20th century, a flatness/levelness measuring device trademarked "Dipstick" has been used to produce concrete and pavement surface profiles and to help establish profile measurement standards in the concrete floor and paving industries.
Two methods used to measure level; Direct or Mechanical method, and Indirect or Inferential methods. Direct level measurement is simple, almost straightforward and economical; it uses a direct measurement of the distance (usually height) from the datum line, and used primarily for local indication.
Level measurement devices can detect, indicate, and/or help control liquid or solid levels. Level measurement devices can be separated into two categories: direct or mechanical measurement and electronic measurement. The device used for a process is based on the material used as well as its corrosivity and toxicity.
