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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Please log in to view the complete version of this paper. As the diesel particulate matter PM mainly consists smoek soot and the adsorbed unburned hydrocarbons SOF on soot core, the PM content has been related to exhaust soot content and HC concentration as below.

HSU – Hartridge Smoke Unit (exhaust gas measurement) | AcronymFinder

Visible black smoke emissions from diesel engine result on account of high concentration of soot in the exhaust gas. Select a valid country. Poor control of fuel injection rate during acceleration also increases smoke. This item may be a floor model or an item that has been returned to the seller after a period of use.

Skip to main content. Take a look at our Returning an item help page for more details. Description Postage and payments. They are often used to evaluate smoke emissions in locations outside the laboratory, such as in maintenance shops or in the field. In view of these conflicting solutions, a simple switch to a different wavelength would not be sufficient.


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Higher combustion rates are obtained by increasing fuel air mixing through use of high swirl rates, smke increasing injection rate and improving fuel atomization. See other items More Back to home page. Mechanisms of Formation of Soot and PM. These instruments have been designed to quantify the visible black smoke emission utilizing such physical phenomena as the extinction of a light beam by scattering and absorption. Watch list is full.

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

Smoke opacity limits may be also included as auxiliary limits in new engine harrridge standards. Redeem your points Conditions for uk nectar points – opens in a new window or tab. See all jrmotorservices has no other items for sale. Sign up for newsletter. Genesis and Mechanism of Formation of Engine Emissions. Representative APR variable May not post to United States – Read item description or contact seller for postage options.


Smoke opacity instruments measure optical properties of diesel smoke, providing an indirect way of measuring of diesel particulate emissions. Use of EGR reduces combustion temperatures and oxygen concentration in the burned gases. 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.

Smoke opacity readings generally do not correlate well with other PM measurement parameters. 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.

Smoke has also been measured by filtering a fixed volume of exhaust gases through a filter paper harridge the smoke stain thus formed is evaluated on a grayness scale by a light reflectance meter Bosch smokemeter.

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