The dial gauge is utilised in different tools as stated above and can be separately used to measure the trueness of the circular object, jumping off an object, etc. It consists of an indicator with the dial, which is connected to the plunger carrying the contact point.
Once the contact point is kept in touch with an object to be measured , any unevenness or jumping will cause the plunger to move. The plunger is connected to the pointed in the dial. The dial is such attached that it does not retract but swings in an arc around its hinge point to show the reading in the indicator.
It is a conventional method to use soft lead wire or lead balls to measure the wear down or clearance between two mating surfaces. The lead wire or balls of fixed dimension which is usually larger than the expected clearance are kept between two surfaces, and both are tightened against each just as in normal condition. The change in the width of the lead wire or ball will show the clearance or wear down.
The sounding tapes can be of a mechanical type where the tape is retracted in a coil and connected to a heavy bob at the end.
The mechanical tapes are the most commonly used in all dry ships, however, in tankers ships, electronic sounding gauges, electrically powered servo type gauges, ultrasonic type etc. A small glass instrument for measuring the density and saturation of the salt in the seawater. This is an essential tool for deck officers as the draft survey will be determined using the water density to calculate the cargo weight for loading.
It is also used for ensuring compliance with the load line survey. A form of dial gauge specifically made to measure the crankshaft deflection of the marine engine. The working is similar as explained in the dial gauge, the only difference is the construction which let this tool hang between two webs allowing it to measure the deflection when the crankshaft rotates.
A measuring instrument for a marine engine with pressure indicator dial used to measure the peak pressure generated inside the engine cylinder. The pressure indicator dial is connected to the blowdown valve located on the top of the cylinder. There is a check valve provided before the indicator, which when opens will the pressurised gases to continually flow inside the indicator till it reaches the maximum value in the dial.
Once the pressure is measured, an exhaust valve provided on the side of the valve is opened which release the pressurised gas from the instrument. It is an oil filled pressure gauge instrument which helps in resisting the vibration and also acts as good heat resistant. It is a cylindrical device containing the indicator piston with spring and needle, used to draw the indicator diagram for a particular cylinder when it is fixed on the indicator cock of the unit.
The internal pressure changes in the cylinder are transferred to the indicator piston which is balanced with the spring. The displacement in the piston is magnified and transformed into an indicator diagram by using a precision link mechanism connected to a metal stylus. An instrument which is used to measure areas of irregularly shaped areas of an arbitrary two-dimensional shape on plans or drawings.
These are some of the primary tools and gauges types that are used on board ship. If you feel we have missed any vital tool, then let us know, and we will add it to the list.
Data and charts, if used, in the article have been sourced from available information and have not been authenticated by any statutory authority.
The author and Marine Insight do not claim it to be accurate nor accept any responsibility for the same. The views constitute only the opinions and do not constitute any guidelines or recommendation on any course of action to be followed by the reader. The article or images cannot be reproduced, copied, shared or used in any form without the permission of the author and Marine Insight. Save Save Save Save. An ardent sailor and a techie, Anish Wankhede has voyaged on a number of ships as a marine engineer officer.
He loves multitasking, networking, and troubleshooting. He is the one behind the unique creativity and aesthetics at Marine Insight. Hello Everybody! Thanks for useful tips. Aside Mr. Thanks in advance! Regards, Hasib.
Sir can u tell me what type of question ask in interviw for tr. Fitter job as tr. Hi, Please where can I get a poker gauge? Does it go by any other name?
When I search websites like marine mega store, go 2 marine etc for poker gauge, it comes up with a list of products. I need this urgently, please can anyone assist and point me in the right direction. For above mentioned qury please feel free to contact me shabbirahmad gmail. Great article. Very informative. Regarding the mentioned tongue gauge, this is a very difficult item to search for.
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Get the Answers App. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers. Gauge is used for things you can't measure with numbers. He wants to Gauge our rediness Measure is used for quantifiable things I measured the length of the car Scale is used when the intent is to compare it to something else.
Scale is usually used a noun though. Rarely as a verb, while the other two are verbs Scale the fish for me. See a translation. Read more comments. And scale is to make something bigger or smaller. The one learning a language!
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