The TM data II utilizes the Tyndall effect for scattered-light measurements. Maximum intensity is achieved for particles with dimensions comparable to the wavelength of the light source. As this technique is insensitive towards coarse particles, no pre-separation is necessary. With no pump required, the instrument does not affect the aero-dynamic and concentration situation at the measurement site.

  • Little maintenance requirements
  • Very long battery operation time
  • Intuitive operation
  • Direct display of measurement results via touchscreen


Principle of operation: 1 Scattered-light measurement
(Tyndall effect)
Measured particle
Respirable dust acc. to Johannesburg Convention,
max. sensitivity for particles of 1 μm
aerodynamic diameter
Calibration method: Comparis on with gravimetric measurement
Measurement volume: approx.0.5cm³
Measurement range
0-100 (DEHS particles,d=1μm)
0.01 (DEHS particles,d=1μm)
Detectionlimit[mg/m³]: 0.01 (measurement time atleast 1min.
and with exact zero-point adjustment)
Linearity: 1%
Temperature dependence: approx. 5% between 10 °C and 40 °C
Measurement modes:
  • Continuous momentary value
  • Averagevalues
Memory capacity: atleast 80.000measurementvalues
  • USB
  • Bluetooth
User interface: Touchscreen, resistive (8.1cm/3.2”)
Charging time: approx.6h
Operating time
when fully charged:
Dimensions[mm]: 201 x 101 x 51(Lx W x H)
Weight: approx.600g
USB power supply: 100V ...240 V AC (1 Amax.), 50...60Hz,
Output: 5V /2,1 A(10,5Wmax.), Adapterset EU/GB/US/CN
Min. system requirements: PC with Windows7or8.1,dual-core processor, 2 GB RAM, harddisk with 200MB free memory,
1 free US Bor Bluetooth interface
  • Leather carrying belt
  • zero-point adjustment kit
  • calibration set




  • Construction sites
  • Handling of bulk goods
  • Tunnel construction
  • Wood processing
  • Mining (daylight and deep)
  • Filter monitoring
  • Oil fume
  • Welding fume
  • Venting systems
  • Production of delicate components

Ask Quick Question