RX-415 (Discontinued)

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


  • 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


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.


  • Measures gas concentrations in tank of LNG and LPG carriers
  • Measures gas concentrations in crude oil tankers
  • Measures gas concentration in inert gas generating system (IGS)



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.


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


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