Air Fuel Ratio Meters

External view
PLR-7

MCS-3aRelevant products
Fast Gas Analyzers for HCs, CO&CO2 and NO&NOx
Only Fast Engine Exhaust Gas Analyzers in the world toinvestigate every engine firing cycles in milli-seconds order.
Useful tools to reduce exhaust emissions and to save fueleconomy in transient engine conditions.

Line-up•••

Fast HC analyzer HFR500
Fast CO&CO2 analyzer NDIR500
Fast NO&NOx analyzer CLD500• Calculate AFR from residual Oxygen
concentration in exhaust gas

Tsukasa Sokken Co., Ltd.
はかるをカタチに158-0087 1-19-4 Tamazutsumi
Setagaya-ku Tokyo, Japan
Tel +81 3 3703 4391
www.sokken.co.jp
Mar.2020/AfVer02-En

Air Fuel Ratio measurementfor Engine Research• Fast response for transient engine
conditions• Two types of line-up for High precisionand Portable

High precision Air Fuel Ratio Meter
Model MCS-3a
MCS-3a is capable to measure high precision AFR without to be influenced by
the coexistence unburned gases such as HCs and CO in rich combustion
exhaust gas. The MCS system mainly consists of metering capillaries for samplegas and air, catalyst and a Zirconia Oxygen sensor. The Oxygen concentration ismeasured by Zirconia sensor after the unburnt gases were fully oxidized overcatalyst. The AFR is calculated by the Oxygen concentration and the dilution rate.

Applications
MCS-3aPLR-7•

Optimization of AFR control•

Applicable for real-world On-board driving use•

R&D for lean combustion engines•

Research AFR variation among cylinder to cylinderFeatures• Not affected by the exhaust pressure fluctuation• Provide the accurate results under cold start ormisfire conditions• Wide dynamic-range (7 – 100 AFR)
• Fast response (T10-90<300ms)

Specifications

Dynamic Range

Model PLR-7
PLR-7 is the small and light weight air fuel ratio meter by using multiple
layered UEGO sensors. It is simple to use by installing the UEGO sensor toexhaust manifold/pipe.

FeaturesPLR-7

7 - 100AFR

9.5 - 60AFR+/- 0.1 7 - 30 AFR+/- 0.3 30 - 50 AFR+/- 1.0 50 - 100AFR

Accuracy

Portable type Air Fuel Ratio Meter

MCS-3a+/- 0.3 9.5 - 14.7 AFR+/- 0.1 14.7 AFR+/- 0.3 14.7 - 20AFR+/- 0.7 20 - 30AFR

Results displayed

AFR, Lambda, O2, CO

AFR, Lambda, O2

Response time

T10-90<300ms

T10-90<250ms (depend on the sensor position)

SensorStabilized Zirconia Oxygen sensor

Oxygen pumping UEGO sensor

Sampling

5L/min with 3m heated sample line

Direct insertion sensor into exhaust manifold

Sample point
pressure-10 to 200kPa in peak to peakMax. gas
temperature

0 to 50kPa in averageLess than 600C at the probe inlet

Applicable fuels
Warm-up time

• Wide dynamic-range (9.5 – 60 AFR)

Power requirement 100VAC 50/60Hz, Max. 10A• Fast response (T10-90<250ms)

Near atmospheric-7 - 900℃(recommended 200 – 800C)

Gasoline, Ethanol, Diesel fuel, Propane and the other HCs content fuels• Easy to use and fully portable

Less than 30 minutes

Less than 10 minutes
85 - 120VAC, 50VA
10 - 15VDC (with reverse connection protection)）

Analogue output

0 - 10VDC, 50 ohms
(Selectable O2, Lambda, AFR)

0 - 5VDC, 50 ohms

• Analog output 5V / 10V selectableWeight

Main unit <25kg, Control unit < 1kg

Approx. 1kg• Available RS-232C , USB , LAN

Interface

Ethernet

RS-232C , USB , LAN• Suitable for On-board use (support 12vDC)+/- 1.0 30 - 40AFR+/- 1.5 40 - 50AFR+/- 2.0 50 - 60AFR