Creative Gas Detection Solutions

EX-5120 Infrared Hydrocarbon Sensor

EX-5120 Infrared Hydrocarbon Sensor

Home » Products » Remote Gas Monitoring – Sensor Transmitters » EX-5120 Infrared Hydrocarbon Sensor

EX-5120 Infrared Hydrocarbon Sensor

Remote Gas Monitoring Sensor Transmitter with Infrared Sensor for Hydrocarbons

EX-5120 remote gas monitoring sensor transmitter incorporates a sensor that operates on the NDIR principle to monitor the concentration of hydrocarbon gas. It can be calibrated for a specific gas, such as methane, but also responds to some other hydrocarbon gases, including propane, butane, etc. The sensor features an integral semiconductor for temperature compensation, a durable tungsten filament IR light source, filter and a dual temperature-compensated pyroelectric infrared detector. This sensor transmitter can operate in anaerobic atmospheres and in continuous hydrocarbon environments. This unit provides long-term stability and requires minimal maintenance.

The EX-5120 sensor transmitter operates on 24 VDC power and features three LED alarm point indicators, 4-20 mA output and optional alarm relay board. This sensor transmitter can be connected to various single and multi-channel ENMET controllers or computer-based instrumentation, such as PLCs, SCADAs, BMSs, etc.

  • Infrared sensor
  • Three alarm LEDs
  • 24 VDC, 4-20 mA
  • NEMA 4X, NEMA 7 and IP66 rated enclosure
  • Immune to poisoning
  • Operates in anaerobic atmospheres and in continuous hydrocarbon environments
  • Minimal maintenance and long-term stability
  • Liquid crystal display
  • Non-intrusive calibration
  • Designed for Class I, Division 1, Groups B, C, & D

Display:  Backlit LCD

Alarm Indicators:  3 LEDs at programmable set points

Sensor Type:  Infrared (IR)

Menu/Calibration:  Magnet-actuated switches

Voltage:  24 VDC powered

Output:  4-20 mA

Installation:  3-wire

Connection:  1/2 inch NPT, conduit

Humidity Range:  0-95%rH, non-condensing

Temperature Range:  -4 to +122°F (-20 to +50°C)

Weight:  5.5 lbs (2.5 Kg)

Approval & Certifications*


Class I, Groups B, C, D
Class II, Groups E, F, G
CanElec: EEx d IIC, IP66

IR Sensor:

ATEX certifications:
I M2 EExd l
II 2 G EEx d IIC


FM Standard 3615
CSA Standard C22.2 No. 30
UL Standard 1203
CENELEC EN 50014, 50018

IECEx certifications:
Ex d l and/or Ex d IIC

UL Recognized:
Class I, Groups A, B, C, D
T4 with 60°C ambient.

*Approvals and certifications apply to the sensor and enclosure as individual components, not for the combined unit.

EXAMPLES of Some Typical Calibrations

Gas/Vapor              Range: % Vol.       Range: % LEL

Methane, CH4        0-5.0                        0-100

Methane, CH4        0-100                       —

Propane, C3H8      0-2.1                        0-100

Propane, C3H8      0-100                       —

Propylene, C3H6   0-2.0                        0-100

Butane, C4H10       0-1.6                        0-100

Pentane, C5H12     0-1.5                        0-100

Ethane, C2H6         0-3.0                        0-100

Some other calibrations (% by volume) available:

Ethylene 0-3%

Isopropanol 0-2%

Hexane 0-1%

Methanol 0-5.5%

Ethanol 0-5%

ETO 0-3%

Toluene 0-1.1%

Methyl bromide (CH3Br) 0-25000 ppm

  • Butane (C4H10)
  • Combustible Gas
  • Ethane (C2H6)
  • Ethanol (CH3CH2OH)
  • Ethyl alcohol (C2H5OH)
  • Ethylene (C2H4)
  • Ethylene oxide (ETO) (C2H4O)
  • Hexane (C6H14)
  • Hydrocarbons
  • Isopropanol (CH3) CHOH
  • Isopropyl alcohol (IPA) (C3H8O)
  • Methane (CH4)
  • Methanol (CH3OH)
  • Methyl alcohol (CH3OH)
  • Natural Gas
  • Pentane (C5H12)
  • Propane (C3H8)
  • Propylene (C3H6)
  • Toluene (C7H8)

Calibration Equipment/Replacement Parts/Accessories for EX-5120:

Part No.                 Description

03700-034            Sampling/Calibration Adapter for EX-5120 Sensor/Transmitters

02506-004            Gas Regulator Assembly for 34 liter steel gas cylinders

04546-004            Splash Guard for EX-5120

50030-001            Replacement Magnet

To place an order, please contact our experienced and professional customer service team:

PHONE: 734-761-1270

If you cannot find what you need or require a custom part, simply call and speak to one of our knowledgeable gas monitoring experts. They will be able to walk you through the ordering process quickly and professionally.

Description                                                                                                                              Part No.

EX-5120 Sensor/Transmitter supplied with magnet and instruction manual              10014-003

Sign up for our newsletter?

Stay up to date with our happenings, developments and new products!

Leave details