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

Terms and conditions apply. Smoke emissions can be reduced by accelerating combustion.

As the diesel particulate matter PM mainly consists of 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.

Find out more about your rights as a buyer – opens in a new window or tab and exceptions – opens in a new window or tab. The actual VAT smooe and rates may vary depending on the final sale. Gartridge not post to United States – Read item description or contact seller for postage options.


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. Watch list is full. Please enter up to 7 characters for the postcode.

Please enter a valid postcode. Smoke opacity instruments measure optical properties of diesel smoke, providing an indirect way of measuring of diesel particulate emissions.

Hartridge Smokemeter 4 HR – Opacimeter Diesel Engine Exhaust Tester | eBay

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

Higher combustion rates are obtained by increasing fuel air mixing through use of high swirl rates, by increasing injection rate and improving fuel atomization. In view of these conflicting solutions, a simple switch to a different wavelength would not be sufficient.


If you have questions about this VAT, please contact the seller. There have been various attempts to improve the sensitivity of diesel opacity meters, for instance by using multiple light path systems with mirrors [].

Smoke Opacity

Smoke opacity limits may be also included as auxiliary limits in new engine emission standards. Resume making your offer if the page doesn’t update immediately. Please enter a number less than or equal to 1.

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Contact the seller – opens in a new window or tab and request post to your location. This item will be sent through the Global Shipping Programme and includes international tracking. Full access requires DieselNet subscription. Hartrkdge over to zoom – Click to enlarge. No additional import charges on delivery.

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