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  • Overview
  • Specification

CQCM: Carousel Quartz Crystal Microbalance

The SEMTECH-CQCM is a carousel quartz crystal microbalance for the measurement of particulate matter.


  • 1065 Compliant: The SEMTECH-CQCM meets the US EPA 1065 compliance requirements for in-use testing.
  • Continuous Sampling System: Pre-conditioning and post-conditioning of crystals while one is sampling.
  • Configurable Dilution Ratios: The unit can be set to dilution ratios ranging from 4:1 to 60:1.
  • Direct Sample Path: Diluted sample is routed directly from the MPS to the CQCM through a gas interconnect, which joins the bottom outlet of the MPS module to the top inlet of the CQCM module.
  • Data Processing: Reduced analysis time takes approximately 5 minutes instead of 24 hours.
  • Graphical Panel Display: A full color, graphic touch screen displays live data, and enables system setup and basic functions.
  • Power Supply Monitoring: Power can be either 12 VDC, 110 VAC or 220 VAC, with both current and voltage monitoring.
  • Weatherproof Construction: All components meet IP54 (NEMA 3) standards.
  • Shock Resistance: The mechanical design has been optimized for resistance to shock and vibration, ensuring data in the most rugged of in-use environments.
  • Design Details: Over a decade of experience in in-use emissions testing has gone into the design details of the SEMTECH ECOSTAR system, including:

    • EMI protection, including gaskets, filters and capped connectors
    • Stress relief for pneumatic connections
    • Channels for cable management
    • Standard Swagelok™ bulkhead connectors
    • Rugged Deutsch connectors for power and auxiliary connectors
    • Handles that lock to other SEMTECH ECOSTAR modules for stable system integration

The SEMTECH-CQCM is a small and robust particulate measurement device that meets the requirements of US EPA CFR 40 part 1065. The system is comprised of eight sampling units, each with a heated inlet, electrostatic precipitator and quartz crystal. The system works directly with the SEMTECH-MPS, with diluted sample entering through a port from the bottom of the MPS to the top of the CQCM.

Power: 12VDC; 110-220 VAC
Storage temperature: Dry -10°C to 60°C
Operating environment: -10°C to 40°C ambient
Dimensions: 43.6cm x 30.8cm x 28.0cm (WxDxH)
Weight: 30 kg
Data transmission: Ethernet, USB
Electromagnetic interference and susceptibility: CE Standards: IEC 61326: 2002-2
Sample flow rate: < 1.0 l/min
Sensitivity: 0.002 µg
Operating Speed: 1 Hz
Warm Up Time: 60 minutes at 20°C ambient


  • Vehicle Interface: Vehicle network data is obtained through the vehicle interface, recording important vehicle parameters along with the emissions data.
  • Enhanced Accuracy GPS: The GPS receiver tracks the route taken by the vehicle under test, recording signal quality, date, time, latitude, longitude, altitude and speed.
  • Weather Probe: The plug-and-play weather probe provides accurate humidity readings used in the emissions calculations.
  • Shock Mount Plate: This custom designed shock mount plate protects your equipment by absorbing the inevitable vibrations that come with in-use testing.

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