On-board Emissions Measurement System
OBS-ONE PM unit is the industry-leading on-board Particulate Matter (PM) measurement system. It collects PM on a filter paper, using a partial flow gravimetric sampling method, while simultaneously measuring real-time PM. A key feature of this design is the use of a venturi flow meter which enables reliable proportional sampling and accurate exhaust gas flow measurement under transient flow conditions. Combine the GAS unit and PM unit to perform certification tests on heavy duty and non-road vehicles.
◎ The world’s smallest PM measurement system in its class*
*As of July 2015. Based on our company's research.
◎ The reliable test method for high speed flow rate control
◎ User-friendly design mounts easily on any vehicle
(modular and front-access design)
OBS-ONE and other HORIBA ONE series measurement devices employ a common interface with future expandability. Control and management of each emission measurement device can be integrated into a single controller, as well as provide notifications of system health.
|Measuring Principles||Batch sampling: Filter gravimetric method|
Real-time PM measurement : Diffusion charging method
|Measuring Ranges (Real-time PM sensor)||0 to 2500 mm/cm3 (Concentration after dilution）|
|Dilution Method||Partial flow dilution method (Proportional sampling mode/Fixed dilution ratio mode)|
|Signal for Gas Sampling||Exhaust gas flow rate: Isolated analog signal (0-10 V)|
|Flow Rate of Diluted Gas||10 to 15 L/min (Under the conditions of 20 deg.C and 101.3 kPa)|
|Filter Holder||Diameter 47 mm, Effective diameter 26.2 mm (Without backup filter)|
|Particle Pre-classifier (Cyclone)||99% penetration of particle size of less than 1 μm|
50% cut off point: particle size between 2.5 and 10 μm
|Power Requirements||DC 24 V|
|Power Consumption||Max. 0.6 kVA|
|Dimensions||350(W) x 470(D) x 460(H) mm (Excluding controller and protruding objects)|
|Mass||Approx. 45 kg (Excluding controller)|
|Operating Conditions||Temperature: 0 to 40 deg.C (During operation)|
Relative humidity: less than 80% Altitude: 0 to 2000 m above sea level
Combination of PM measurement unit and GAS measurement unit
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