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FDL-7 [NH3] Laser Ammonia Leak Detector

FDL-7 [NH3] Laser Ammonia Leak Detector

The FDL-7 [NH3] is the world’s first remote detector designed specifically for ammonia. Simply point the laser towards the area you like to inspect and the instrument shows the concentration in parts per million / meter (ppm*m). An acoustical and optical alarm can be set to indicate an exceeded threshold. The ATEX Zone II certification allows the operation in explosion hazardous areas.
   – Detects ammonia remotely up to a distance of 20 m / 65 ft.
   – Self-explanatory user interface
   – Wide operating range from -17°С to +50°С / 1.4 F to 120 F
FDL-7 [NH3] Remote Ammonia Detector

Main applications:
   – Production and processing
   – Transport and distribution
   – Chemical industry
The novel FDL-7 [NH3] is based on tunable diode laser absorption spectroscopy (TDLAS). A highly visible green guide laser shows exactly the measurement position to easily identify the leak. The compact handheld instrument is designed for all leak detection tasks in the ammonia processing industry including production and transport industry. The operation is self-explanatory and particularly suitable for emergency on-site services. Via the ATEX Zone II certification it can be applied in explosion hazardous areas where only intrinsically safe equipment is allowed.


Technical Specifications:

FDL-7 [NH3]

Measurement method

Tunable diode laser absorption spectroscopic (TDLAS)

Measurement range

0 ~ 2.000 ppm–m


10 ppm*m @ 0 – 10 m / 0 – 33 ft.

20 ppm*m @ 10 – 30 m / 33 – 98 ft.

Response speed

< 0.2 sec

Detection distance

0.5 ~ 20 m / 1.6 ft. ~ 66 ft.

Beam size

approx. 17 cm @ 20 m distance / 6.7” @ 66 ft.


changing acoustic alarm depending on concentration


Detection laser: Class I

Guide laser (green)

Class IIIa


2.8-inch color LCD (touch screen)

Operating temperature

-17°С to +50°С / 1.4 F to 120 F


5 to 90 % RH


1.3 kg / 2.9 lbs.


213 × 155 × 66 mm / 8.4 x 6.1 x 2.6 inches

Power supply

Rechargeable Li-ion battery

Battery life

up to 8 hrs.

Battery charging

5-6 hours for a complete charge

Intrinsically safe

ATEX ll 2G Ex ib llA T3

Calibration gas


Protection class



USB, earphone, DC jack, GPS, Bluetooth®


24 months

Scope of delivery

FDL-7 [NH3] device, transport & storage case, carrying strap, earphone, charging station, protective lens cap and user manual

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