LEL / O2 or CH4 / 02 for LNG, LPG, & cude oil tankers.


RKI Instruments

This model has two versions and is a combination type portable HC/O2 or CH4/O2 gas detector with an Infrared (NDIR) type sensor and galvanic cell type sensor. These sensors provide accurate detection of HC/O2 (HC version) or CH4/O2 (CH4 version) levels even in N2 and other inert environments. The measuring ranges are 0-100%LEL/0-100 vol% for HC or CH4 and 0-25 vol% for )2 respectively with automatic ranging. The RX-415 has explosion proof and intrinsically safe construction so that it can be used safely in any environment.

Quick Overview

    Available to measure from higher concentration (vol%) to lower concentration (%LEL) Explosion proof (Detector: Explosion proof, other electrical circuit and pump, intrinsically safe design) Available to measure HC/O2, CH4/O2 in N2, inert gas and air with a reliable NDIR method
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RX-415 (HC version) RX-415 (CH4 version)
Gas Detected
Oxygen (O2)
Oxygen (O2)
Detection Principle NDIR (Non-Dispersive infrared) Galvanic cell NDIR (Non-Dispersive infrared)
Galvanic cell
Detection Range (Increments) 0~100%LEL
0-100vol% (0.5%vol/digit)
(auto range)
0-25 vol% (0.1%vol/digit) 0~100%LEL
0-100vol% (0.5%vol/digit)
(auto range)
0-25 vol% (0.1%vol/digit)
Sampling Method Built in sample pump
Response Time
Within 30 seconds (T90)
Ambient Temp/ Humidity
-10°C ~ + 40°C(14 to 104°F), below 90%RH, non-condensing
Continuous Operation Approx. 40 hours (no alarm or light, at 20ºC)
Power Source 4 “C” Alkaline dry cell batteries or optional Ni-Cad
Dimensions & Weight Approx. 80 (H) x 200 (W) x 142 (D) mm (3.1” H x 7.9” W x 5.6" D), approx. 2 kg (4.4 lbs)
Standard Accessories
    Filter tube with flow monitor
    Connection tube (green)
    Spiral sampling tube
    Gas sampling probe
    Carrying case with shoulder strap
    Alkaline battery (4 "C" size)
    Operation manual
Optional Accessories
    Sampling tube (30M)
    Gas sampling bag
    Ni-Cad battery charger

Specifications subject to change without notice. 

Additional Information

Manufacturer: RKI Instruments

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