ELLI is an innovative, portable laser methane (CH4) measuring device that can easily monitor difficult or impossible to reach areas and hazardous areas from a distance. By the TDLAS (Tunable Diode Laser Absorption Spectroscopy) detection technology, it is possible for the user to determine methane safe from a distance. For this purpose, the laser beam must be directed only to the post to be checked. This detection technology therefore provides a high added value for the user who does not have to enter a potential hazardous area for the inspection of pipelines. Only in the event of a gas leak properly trained staff must be employed by an Identified leak check and seal. Previously it was very difficult and especially time-consuming and costly to detect gas leaks using conventional flame ionization or semiconductor gas detectors. By this significantly reduced verification effort the review of gas leading systems or pipelines is very cost effective compared to conventional verification methods.



  • Colored LCD touch screen
  • Selective detection of methane
  • Integrated GPS and bluetooth functionality
  • User-defined alarm threshold
  • Rugged housing design IP54
  • Very fast reaction for the detection of smallest amounts of methane
  • Detection of methane also by multiple insulating glazing
  • Simple, intuitive operation via function keys and touch screen
  • No cross sensitivity to other hydrocarbons
  • Green laser marker „CLASS 2M“ for optimum visibility measuring range, even in direct sunlight
  • Choice of graphical or numerical display of the measured values
  • Monitoring of reflection quality by appropriate optical and acoustic indication
  • Rechargeable Li-ion Battery for 8 hours working time

Technical data

Calibration gasMethane (CH4)
DisplayColoured LCD-Touchdisplay
Reaction time0,1 seconds
Detection methodTuneable diode laser absorption spectroscopy (TDLAS)
Operating time8 hours per charge (6 hours charging time)
Power supplyRechargeable Li-ion Battery
Scanning range30 m standard, 50 m under good reflection conditions
Weight1,6 kg
Dimensions237 x 167 x 74 mm
Measuring range0 ... 50.000 ppm x m
Temperature range-17 °C to 50 °C
Humidity5 to 90 % rel. humidity
Protection classIP54
ConnectionsUSB, earphone, DC jack, GPS, bluetooth
Data storagemeasured values, GPS
Scope of deliveryEarphones, carrying strap, rugged carrying case, charger
Guarantee24 month

Device variants

keyboard_arrow_downELLI Esders Laser Leak Indicator Set

ELLI Esders Laser Leak Indicator Set
ELLI is an innovative, portable laser methane (CH4)
measuring instrument that can be easily monitor
difficult or impossible to reach areas and hazardous
areas from a distance.

technical data:
Calibration gas: methane (CH4)
Display: color LCD touch screen
Scanning range: 30 m standard, 50 m under good reflection conditions
Reaction time: 0.1 seconds
Detection method: tuneable diode laser absorption spectroscopy (TDLAS)
Weight: approx. 1,6 kg
Dimensions: approx. 237 167 74 mm
Measuring range: 0 ... 50.000 ppm x m
Temperature range: -17°C to 50°C
Humidity: 5 to 90% rel. humidity
Protection class: IP54
Operating time: 8 hours per charge (6 hours charging time)
Power supply: rechargeable Li-ion battery
Connections: USB, earphone, GPS, bluetooth
Scope of delivery: earphones, carrying belt, rugged carrying case,


keyboard_arrow_downTest equipment:

Calibration glass for Esders Laser Leak Indicator ELLI
- includes testgas for a smooth calibration
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Software basic licence Pi Note for one workplace
Esders Pipeline inspection Note PC software licence for
1 workstation. Software for the import of the recorded data
from the Pi Note Android App. The software enables easy
and low-cost documentation of work when carrying out
inspections on gas pipelines. Pi Note is a GPS datalogger
for Android terminal devices, that enables easy logging of
damage, defects and photos.
Continuous recording of gas concentrations is possible
via a Bluetooth data connection to the Esders
measurement instruments ELLI, GOLIATH and HUNTER.
- the basic licence includes one device licence
It is possible to handle the recoded data of only one
measurement device (serial number)
- if you would like to use additional measurement instruments
you have to buy additional licences
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Spare parts

keyboard_arrow_downSpare parts:

Carrying case for Esders Laser Leak Indicator ELLI
- with integrated foam insert for equipment and accessories
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Carrying belt GOLIATH, HUNTER, GasTest delta3 and ELLI
length adjustable
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