Heath Consultants RMLD-FR, Operator'S Manual

Operator’s Manual

3

RMLD-FR

Doc No. 16086 Rev A, RMLD-FR Operator Manual 

© 2021 Heath Consultants Incorporated. All rights reserved.

1

Laser Beam 

Is Transmitt

ed

2

Plume Absorbs

Some Laser

3

Some Laser

Passes Through

6 

Remaining Laser R

eturns t

o

RMLD-FR and Is Measur

ed 

4

Laser

Reflects Back

5

Plume Absorbs

Some Laser

Remote Detection for Increased Safety 

The RMLD-FR uses highly advanced technology to detect natural gas 
plumes from a remote distance. This makes it safer to scan in areas that 

may be difficult to reach such as busy roadways, yards with dogs, fenced 
off areas, and other hard to access places.

Tunable Diode Laser Absorption Spectroscopy (TDLAS)  

The RMLD-FR employs Tunable Diode Laser Absorption Spectroscopy 
(TDLAS) technology.  

As the laser passes through the gas plume, 

the methane absorbs a portion of the light, which the 

instrument then detects. Based on the local meteorological  

conditions, a given amount of gas escaping from the ground 

will produce a plume that varies in size and uniformity of concentration 

levels. The plume, by nature, is variable and dependent on the soil 

conditions, temperature, wind, and leak rate.

Features 

The RMLD-FR includes many features which reduce costs and improve  

usage. These advanced features include, but are not limited to:

- User Interface - highly optimized   

for First Responders

- Internal Data Logging
- WiFi
- GPS
- Bluetooth BLE 
- Color Camera  
- Color Display

- Spotter laser
- Self Test
- Light Weight
- Rechargeable and Replaceable 
   Battery
- Dual Charger
- Ergonomic Housing

Overview

Proprietary Notice

The contents of this instruction manual are proprietary to Heath Consultants Incorporated. Reproduction of this 

manual, in whole or in part, is prohibited without the express written consent of Heath Consultants Incorporated.

Heath Consultants Incorporated operates under a continual product improvement program and reserves the right to 

make improvements and / or changes without prior notification.

This manual supersedes all previous manuals for this instrument. 

Operates under a  

variety of field 

conditions including:

- wide temperature range, 

- light rain and fog.

Safe scanning from distances  

of 100’ and 50’, using a 

vehicle and tree for a shield  

as an extra precaution.

Rugged design  

stands up to normal  

field use and operating 

conditions. 

Sensitivity or range  

is not affected by 

reasonable amounts  

of dust on the  

instrument’s window.

100’

50’

100’

50’

FIRE  DEPT