Analyzer LaserGas™ OpenPath HF


NEO Monitors LaserGas™ III new HF Open Path Gas Detector is specifically designed for service in hazardous areas. Based on our third generation LaserGasTM Technology, the entire instrument is built into compact flameproof enclosures making it fit for zone 1 applications. The LaserGas™ III OP HF consists of a transmitter and receiver unit that is mounted diametrically opposite each other at distances up to 100 meters. The laser light is sent from the transmitter to the receiver and any HF concentration changes along the optical path from the transmitter to the receiver are detected in real-time.

Technical data

Type: Near IR Diode Laser; Spectroscopy
IR-source: Diode laser Class1 M, eye safe
Detected gas: HF
Range: Minimum 0-5 ppm*m
Path lenght: 5-100 m
Self-test: Continuous
Calibration: Factory set, no field; calibration necessary

Zero: <+/- 1% of full scale
Repeatability: <+/- 1% of full scale
Response time: 5 sec (adjustable)

Alignment: +/- 0.15 deg
Obscuration: > 90%

Output signals
Standard: 4-20 mA source or sink, max load impedance 500 Ohm
Options: Ethernet
Fault signals: Fault 1mA; Beam Block 2 mA; Warning 3 mA

Power Supply: 24V DC range 18-32V DC
Power consumption: < 15W

Temprature range
Storage temprature: -55 °C to 75 °C
Operating: -40 °C to 65 °C
Humidity (operational): 100% RH

TU and RU: Stainless steel (ASTM 316)

Dimensions / weight
Footprint/weight: Ø 125mm x 250 mm/5.5 Kg (12 lbs.) per TU or RU

Visual inspection: Recommended every
6 – 12 months (no consumables needed)
Calibration: Check recommended every 12 months

Laser class: Class 1 according to IEC 60825-1, eye safe
CE: Certified
EMC: Conformant with directive 2014/30/EU

IECEx/ATEX zone 1: II 2 G Ex d [op is] IIC T6
(TU/RU) II 2 D Ex tb IIIC T88 °C
Ingress: IP66/IP67 IEC 60529
SIL: Suitable for use in SIL2 systems

Optional junction box (technical data)
Junction box: GRP / aluminum
Footprint Junction box: 250 mm x 250 mm/ 2.0 Kg (4.4 lbs. per Junction Box )
ATEX rating: II 2 G Ex e I IC T4/T5/T6

Additional information


NEO Monitors


Cement plants, Chemical and petrochemical industry, Heavy industry, Waste incineration plants

Measured parameters

Hydrogen fluoride (HF)


Gas detection