Smokemeter Mark 4 HV Opacimeter, Diesel Engine Exhaust Tester Hartridge – Made in UK Included- – Trolley/ Cabinet – Lucas Printed Circuit. How to choose the correct diesel exhaust emission smoke meter for automotive diagnostic use and MOT/DOT (also know as HSU – Hartridge Smoke Units). There are two groups of conventional smoke meters include the Hartridge or Bosch RTT opacity meters.

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What is Hartridge Smoke Unit (HSU) ? for Diesel engine emission | Physics Forums

Westbury, Wiltshire, United Kingdom. This is a preview of the paper, limited to some initial content. Please log in to view the complete version of this paper. May not post to United States – Read item description or contact seller for postage options. There have been various attempts to improve the sensitivity of diesel opacity meters, for instance by using multiple light path systems with mirrors []. In fact, the smoke opacity measurement is the only relatively low-cost and widely available method to measure a PM-related emission parameter in the field.

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Representative APR variable This item may be a floor model or an item that has been returned to the seller after a period of use. Smoke opacity readings generally do not correlate well with other PM measurement parameters. The actual VAT requirements and rates may vary depending on the final sale. Genesis and Mechanism of Formation of Engine Emissions. Visible black smoke emissions from diesel engine result on account of high concentration of soot in the exhaust gas.


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Smoke emissions increase with increase in engine load due to overall richer fuel-air ratios and hence, the rated engine power was specified based on the maximum permitted smoke density to curb black smoke emissions during engine operation. Red, however, is less sensitive to small particles than green. Learn more – opens in a new window or tab.

Smoke and smoke opacity meters are instruments measuring the optical properties of diesel exhaust. See all condition definitions – opens in a new window or tab. Buy it now – Add to Watch list Added to your Watch list.

Smoke has also been measured by filtering a fixed volume of exhaust gases through a filter paper and the smoke stain thus formed is evaluated on a grayness scale by a light reflectance meter Bosch smokemeter. Smoke emissions can be reduced by accelerating combustion. There are 1 items available. Find out more about your rights as a buyer – opens in meteer new window or tab and exceptions – opens in a new window or tab.

For additional information, see the Global Shipping Programme terms and conditions – opens in a yartridge window or tab. Be the first to write a review. Description Postage and payments.

Second generation opacity meters based on laser light scattering are much more sensitive and appear to hold promise for application to newer engines with much lower particulate emissions. Get the item you ordered or your money back.


Higher combustion rates are obtained by increasing fuel air mixing through use of high swirl rates, by increasing injection rate and improving fuel atomization.

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Smoke Opacity

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Correlations have been developed to estimate PM mass emissions based on opacity measurement. Terms and hrtridge apply. Add to Watch list Watching Watch list is full.

What is Hartridge Smoke Unit (HSU) ? for Diesel engine emission

Frequently bought together Feedback on our suggestions – Frequently bought together. In view of the demands of advanced, low emission diesel engines, the following areas of concern can be identified in conventional smoke opacity meter technology:.

In general, smoke and opacity meters are much simpler some of them very simple and less costly in comparison to most other instruments used for PM measurement. Most purchases from business sellers are protected by the Consumer Contract Regulations which give you the right to cancel the purchase within 14 days after the day you receive the item.

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