The SENKO SGT is a low cost disposable sensor, guaranteed 2 years operating life without recharging or calibration required.

IECEx Approved


The detector uses natural diffusion into electrochemical sensors with it's state of the art electronics and software to give reliable and repeatable readings. The casing is a rubber based special high strength material giving it an IP67 rating making it anti-slip, completely dust proof and water proof up to 1 meter. The sensor has inbuilt data logging which will timestamp the gas level readings and alarms. This data can be downloaded to a PC using the SGT IR Link for analysis. The gas detector can be operated continuously for two years without replacement and then can be safely disposed of.

  • IEC Ex approved
  • Large LCD display of alarms and current concentration
  • Clearable Max and Min gas concentration recorded
  • Adjustable alarm levels using the SGT IR Link
  • Self testing and No calibration required
  • Lifetime remaining displayed in months
  • Self zero gas adjustment function
  • Data uploading of concentration and alarms (see implementation section)

Fully Technically Supported by Gas Detection Australia


Related Products

Confined Space Gas Monitors

May confined spaces have a high threat of poisonous gases and man-down incidents. Responders or workers need to be protected by ongoing, continuous atmospheric monitoring. SENKO Gas Detection Australia's portable gas detectors are built to protect you and your staff and from comply with Australia regulations. With IP 67 Waterproof and IEC Ex Approved Explosion proof casing, data logging, simple calibration and set up. The SENKO Gas Detection Australia Line of Portables are ready to go when you are.

Hazardous Areas (IEC Ex Certified)

IEC Ex approved gas detectors and sensors for use in Zone 1 areas within Australia for both Toxic and Flammable gases.

Hazardous Areas are areas in which an explosive gas atmosphere is or may be expected to be present, in quantities such as to require special precautions for the construction installation and use of equipment construction, installation and use of equipment. Hazardous areas are classified into 3 zones based upon the frequency of the occurrence and duration of an explosive gas atmosphere, as follows:

  • Zone 0 - Area in which an explosive gas atmosphere is present continuously or for long periods or frequently.
  • Zone 1 - Area in which an explosive gas atmosphere is in which an explosive gas atmosphere is likely to occur in normal likely to occur in normal operation operation occasionally occasionally.
  • Zone 2 - Area in which an explosive gas atmosphere is not likely to occur in normal operation but, if it does occur, will persist will persist for a short period for a short period only.
  • Non hazardous area (safe area) - A non hazardous area is an area in which an explosive atmosphere is not expected to be present.

As per IEC60079-10-1

Lift Shaft Wells

Oxygen sensors are often placed in lift shaft wells to measure the atmosphere prior to entry. Problems arise due to the pressure changes in the left shaft well due to the air movements associated with the lift.resulting in false alarms . There is also an issue associated with safe work permits for access into the lift shaft area when the oxygen sensor requires calibration or replacement. The GDA 4500 system uses a vacuum pump (dc brushless) , a flow fail mechanism and a sensor  to extract the gas via a 6mm ID tubing. The Nylon tube is fitted with a filter element to provide dust filtering and prevent mycological build up in the sampling line.

Designed, Manufactured and Supported in Australia.

Specification NameSpecification Value
Detectable Gas Ranges0₂ = 0~30%Vol | CO = 0~500ppm | H₂S = 0~100ppm
Output SpecificationsLCD display of current reading with alarm sounder and vibrator
Sensor TechnologyElectrochemical Cell
Power ConsumptionDC3.6V, 1.2Ah Lithium battery
Operating Life24 months, based on 2 minutes of alarm per day
Operating Temperature-40℃ ~ +50℃ (for Toxic) / -35℃ ~ +50℃ (for O2)
Operating Humidity5% ~ 95% RH (Non-condensing)
Dimensions49mm(W) x 84mm(H) x 40mm(D)
Weight93g (Toxic), 104g (O2) (Battery, clip included)
Enclosure MaterialRubber-Base PC Case
ApprovalEx ia IIC T4 Ga (Korea Ex, IECEx, ATEX, CSA & UL, INMETRO)
Warranty24 months from date of dispatch
Enclosure RatingIP67

 SENKO SGT Portable Gas Detector Kit

  • SGT Portable Gas Detector
  • Mains Charger
  • Gassing Cap
  • User Manual
Part Number Gas Sensor Technology Range Resolution Sensor life time
SGT-001 Oxygen (O₂) * Electrochemical Cell 0-30% Vol 0.1% Vol < 2 Years
SGT-002 Carbon Monoxide (CO) Electrochemical Cell 0-500 ppm 1 ppm > 2 Years
SGT-003 Sulfur Dioxide (SO₂) Electrochemical Cell 0-20 ppm 0.1ppm > 2 Years
SGT-004 Hydrogen (H₂) Electrochemical Cell 0-1000 ppm 5 ppm > 2 Years
SGT-005 Hydrogen Sulfide (H₂S) Electrochemical Cell 0-100 ppm 1 ppm > 2 Years
SGT-006 Ammonia (NH₃) Electrochemical Cell 0-100 ppm 1 ppm > 2 Years
SGT-007 Chlorine (Cl₂) Electrochemical Cell 0-100 ppm 1 ppm > 2 Years
SGT-008 Nitrogen dioxide (NO₂) Electrochemical Cell 0-20 ppm 0.1ppm > 2 Years

SGT Link


Part Number Image Description
IR-Link IR-Link Computer USB infrared communicator compatible with SENKO SGT & MGT products
SP-PUMP 101 SP-Pump 101 Sampling pump designed for connection to the SENKO SGT & MGT products.
SGT-4 Dock Docking Station 4 Way Docking Station


* Important Note: Acid gases such as CO₂ and SO₂ will be absorbed by the electrolyte and tend to increase the flux of oxygen to the electrode. This gives an enhanced oxygen signal of approximately 0.3% of signal per 1% CO₂. SENKO oxygen sensors are not suitable for continuous operation in concentrations of CO₂ above 25%.


CALGAS : Calibration Gas

The highlights of the new Portagreen range speak for themselves. They are refillable, compact, made from the highest quality, tested for the lowest failure rate and longest shelf life and totally recyclable.  The Portagreen range of calibration gas cylinders enable businesses to reduce their carbon footprint and cut costs while demonstrating a commitment to the environment.

SENKO IR-Link : Portable Detector to Computer IR Link Communicator

IR Link enables users to set up their Senko Portable Gas Detectors calibration levels, alarm set points, and configuration options as well as download logs.