- Model III - Portable HF Analyzer


NEO Monitors LaserGas is using Tunable Laser Absorption Spectroscopy (TLAS) i.e. a non-contact optical measurement method employing solid-state laser sources. The portable analyzer is compact, lightweight, and battery powered for HF measurement on the spot. With onboard pump and connections for Teflon tubing the target gas is continuously transferred into the internal measurement cell. The instrument´s low power design gives long operating time on each battery cycle.

The analyser provides reliable operation with instantaneous response and sufficient dynamic range to measure sub ppm and several hundred ppm HF concentrations. In contrast to many other measurement techniques, short-term HF peaks are uncovered with the LaserGas III.

  • Most advanced LaserGas technology available (3rd generation)
  • Portable (low weight)
  • Low power usage
  • Sub ppm HF detection
  • No interference from other gases
  • Stable calibration, no zero drift
  • Other gases on request

The LaserGas III Portable HF Analyzer is the solution for reliable detection of shortterm HF concentrations, wherever diffuse emissions occur representing a risk to the work force.

Focused applications are:

  • Aluminium smelters: Worker protectioduring active work
  • Aluminium smelters: Mapping plant emissions
  • Refinery alkylation plants: Worker safety

  • Flexible unit designed for measurement on the spot
  • Allows fast and reliable operation to measure sub ppm and several hundred ppm HF concentrations
  • Regular maintenance not required
  • No cross interference from other gases
  • Short-term HF peaks are uncovered with the LaserGasTM III portable
  • Easy to carry
  • Battery operated for several hours
  • Internal storage of data

  • Detection limit (HF)*: 50 ppb **
  • Repeatability: 1% of range (gas & application spesific)
  • Storage: 3MB

Environmental conditions

  • Operating temperature: -20 ºC to +55 °C
  • Storage temperature: -20 ºC to +55 ºC
  • Protection classification: IP65


  • Analog output (3): 4 – 20 mA current loop (concentration and transmission)
  • Digital output: 10/100 Base T Ethernet (Modus TCP), RS-485


  • Power consumption: Max. 10 W
  • 4 – 20 mA output: 500 Ohm max. load impedance, not isolated
  • Battery: Lithium Ion Battery (14.4 V, 5 A, approx. 10 hours usage time per charge)

Installation and Operation

  • Gas inlet / outlet: 6 mm SMC one touch fittings (series KQG)
  • Sample gas flow: 3 l/min
  • Sample inlet pressure: +/- 50 mbar G / 0.8 PSIG (higher pressures possible with different pump)
  • Sample inlet temperature: Max 85 ºC
  • Calibration: Check recommended every 12 moths
  • Maintenance: Instrument check by Ethernet
  • Filter change: Recommended every 3 months


  • Laser class: Class 1 according to IEC 60825-1, eye safe


  • Dimensions: 110 x 120 x 250 mm (4.3’’ x 4.7’’ x 9.8’’)
  • Weight (incl. battery): 2.3 kg (5 lbs)
  • Display: 2.7’’ colour LCD panel
  • Sample Cell: Teflon coated Aluminium

** NOTE: Detection limits are specified as the 95% confidence interval for 1 m optical path and gas temperature / pressure = 25  ºC/ 1 bar abs, measured in N2.

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