Since its introduction in 2002, Sensors' SEMTECH-DS has set the standard for Portable Emissions Measurement Systems (PEMS). Capable of monitoring both spark ignition and compression ignition engines, the DS measures CO, CO2, O2, NO, NO2 and THC, ensuring compliance with EPA's CFR 1065. Sensors works closely with environmental agencies and engine manufacturers throughout the world, ensuring that the DS continues to define and raise the global standards for in-use vehicle emissions measurement solutions. Available as an on-board analyzer, as shown, or in a 19" rack mount configuration for test cell applications.

 

Heated sample system minimizes the loss of hydrocarbons prior to entering the Fuel Ionization Detector (FID) for analysis.

Fully contained sample conditioning after FID analysis, removes remaining heavy hydrocarbons, thereby minimizing contamination of the optical analyzers.

Proprietary NDUV measures NO and NO2 separately and simultaneously.

Sample pumps operate at constant volume, regardless of ambient pressure, ensuring that transport times are independent of altitude.

Calibration utilities make for easy setup to zero calibrate, span and audit all gases, perform leak tests and purge the system.

Test setup utility offers the user maximum control over test parameters, detection levels and calculation limits.

Post processor time aligns data and calculates real time mass emissions, raw emission concentrations and fuel economy.

Shock resistant design meets MIL STD 810F for shock and vibration.

Ambient operating temperature:	0°C to 45°C
Storage temperature:	-40°C to 60°C
Sample flow rate:	8 SLPM
Data rate:	1 Hz
Warm up time:	60 minutes at 20°C ambient
Power requirement:	12VDC, 70A during warm up, 30A at steady state
Dimensions:	36cm x 43cm x 55cm (HxWxD)
Weight:	35.4 kg (78 lbs)
Communications:	802.3 (10BaseT) and 802.3u (100BaseTX) wired, and 802.11b or 802.11g (DSSS) wireless Ethernet

 

Gas	CO	CO2	NO	NO2	THC
Range	0-8%	0-20%	0-2500 ppm	0-500 ppm	0-100 ppmC	0-1000 ppmC	0-10,000 ppmC	0-40,000 ppmC
Resolution	10 ppm	0.01%	1 ppm	1 ppm	0.1 ppmC	1 ppmC	1 ppmC	10 ppmC
Accuracy	±3% rdg or ±50 ppm	±3% rdg or ±0.1%	±3% rdg or ±15 ppm	±3% rdg or ±10 ppm	±2% rdg or ±5 ppmC	±2% rdg or ±5 ppmC	±2% rdg or ±25 ppmC	±2% rdg or ±100 ppmC
Linearity	Intercept < 0.5% of range 0.990 < slope < 1.01 SEE < 1% range R2 > 0.998			Intercept < 1% of range 0.985<slope<1.015 SEE < 1% range R2 >0.998	Intercept < 0.5% of range 0.990 < slope < 1.01 SEE < 1% range R2 > 0.998
Repeatability	±2% rdg or ±20 ppm	±2% rdg or ±0.05%	±2% rdg or ±5 ppm	±2% rdg or ±5 ppm	±1% rdg or ±2 ppmC	±1% rdg or ±2 ppmC	±1% rdg or ±10 ppmC	±1% rdg or ±40 ppmC
Noise	±20 ppm	±0.02%	±2 ppm	±2 ppm	±2 ppmC	±2 ppmC	±10 ppmC	±40 ppmC
Span Drift	±2% rdg or ±20 ppm	±2% rdg or ±0.1%	±2% rdg or ±20 ppm	±10 ppm	±1% rdg or ±3 ppmC	±1% rdg or ±3 ppmC	±1% rdg or ±15 ppmC	±1% rdg or ±60 ppmC
Zero Drift	±0.005% or ±50 ppm	±0.1%	±10 ppm	±10 ppm	±5 ppmC	±5 ppmC	±10 ppmC	±20 ppmC
Response Time	T90<3 sec	T90<3 sec	T90<2 sec	T90<2 sec	T90<2 sec	T90<2 sec	T90<2sec	T90<2 sec
Flow Rate	2 LPM	2LPM	3 LPM	3LPM	2 LPM	2 LPM	2 LPM	2 LPM
Data Rate	0.833 Hz	0.833 Hz	up to 4 Hz	up to 4 Hz	up to 4 Hz	up to 4 Hz	up to 4 Hz	up to 4 Hz