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Product List


Test and Measurement Instruments C.C.

          CK 1985/007464/23

“Tomorrow’s Instruments Today”  —  “For Good Measure” ®

TMI, Established—1982

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Gas Leak Detectors

Gas Leak Detectors

Part No:  GS-5800 

Ultrasonic Gas Leak Detector, 20 to 100 KHz, Bar LED , for Gas Leaks, and many other fault locations. Can be used with GS-400 for windscreen and other leaks.

R 4,700.00 Excl VAT

Lutron DS5800 Ultrasonic Gas Leak Detector

Part No:  GS-400

Ultrasonic Transmitter, Output 49 KHz (Used with GS5800). Used as Ultrasonic sound source.

R 1,300.00 Excl VAT

Lutron GS-400 Ultrasonic Transmitter



Lutron GS-400 Ultrasonic TransmitterLutron DS5800 Ultrasonic Gas Leak DetectorLutron DS5800 Ultrasonic Gas Leak DetectorLutron GS-400 Ultrasonic Transmitter

Notes on Gas Sensors, Detectors and Monitors with alarms.

Gas leak detectors, Gas Analysers as well as gas sensors interact with a gas to initiate the measurement of its concentration which could be used to sound an alarm. The gas detector of gas sensor then provides output to a gas instrument to display the measurements.  Common gases measured by gas detectors and gas sensors include ammonia, aerosols, arsine, bromine, carbon dioxide, carbon monoxide, chlorine, chlorine dioxide, Diborane, dust, fluorine, germane, halocarbons or refrigerants, hydrocarbons, hydrogen, hydrogen chloride, hydrogen cyanide, hydrogen fluoride, hydrogen selenide, hydrogen sulfide, mercury vapor, nitrogen dioxide, nitrogen oxides, nitric oxide, organic solvents, oxygen, ozone, phosphine, silane, sulfur dioxide, and water vapor.

Important measurement specifications to consider when looking for gas detectors and gas sensors include the response time, the distance, and the flow rate.  The response time is the amount of time required from the initial contact with the gas to the sensors processing of the signal.  Distance is the maximum distance from the leak or gas source that the sensor can detect gases.  The flow rate is the necessary flow rate of air or gas across the gas detectors or gas sensors to produce a signal.

Gas detectors, Gas Analyzers and gas sensors can output gas measurement of the gases detected in a number of ways.  These include percent LEL, percent volume, trace, leakage, consumption, density, and signature or spectra.  The lower explosive limit (LEL) or lower flammable limit (LFL) of a combustible gas is defined as the smallest amount of the gas that will support a self-propagating flame when mixed with air (or oxygen) and ignited. In gas-detection systems, the amount of gas present is specified in terms of % LEL: 0% LEL being a combustible gas-free atmosphere and 100% LEL being an atmosphere in which the gas is at its lower flammable limit. The relationship between % LEL and % by volume differs from gas to gas.  Also called volume percent or percent by volume, percent volume is typically only used for mixtures of liquids. Percent by volume is simply the volume of the solute divided by the sum of the volumes of the other components multiplied by 100%.  Trace gas sensors given in units of concentration: ppm.  Leakage is given as a flow rate like ml/min.  Consumption may also be called respiration. Given in units of ml/L/hr.  Density measurements are given in units of density: mg/m^3.  A signature or spectra measurement is a spectral signature of the gases present; the output is often a chromatogram.

Common outputs from gas detectors and gas sensors include analog voltage, pulse signals, analog currents and switch or relays.  Operating parameters that are important to consider for gas detectors and gas sensors include operating temperature and humidity.

Test and Measurement Instruments C.C. T+M Instruments

Part No:  Altair-Pro

Gas Detector with Alarm for one of many gasses i.e. O2, CO, H2S, HCN, CL2, SO2,NO2,NH3,PH3,O3,02-R. Adjustable alarm set Points, Ruggedised rubber casing.

Altair_Pro_ Gas_Monitor
Altair_Pro_ Gas_Monitor

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Gas Leak Detector Meters

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T.M.I.T+M Products

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Part No:  SDT200

Ultrasonic Gas Leak Detector, for Compressed Air, Steam Traps, Bearing Monitoring, Pump Cavitation Detection. Supplied with Headphones. Large Memory.


SDT270 Ultrasonic DetectorSDT200 Ultrasonic DetectorSDT 270 Gas Leak DetectorSDT200 Gas Leak Detector
SDT Gas Leak DetectorsSDT Gas Leak Detectors

Part No:SDT270

Ultrasonic Gas Leak Detector, for Predictive Maintenance. Two Channel inputs with remote support and Training. For Bearings, Panels, Pump Cavitation etc


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Part No   TM-90061

Airborne Ultrasonic Leak Detector. With flexible sensor, Head Phones, Rugged Carry Case and Manual. For Easy detection of Many Faults. 38,4 kHz +- 2kHz.

R 30.500.00 Excl VAT    TB Confirmed

T + M

T+M Instruments TM90061 Ultrasonic Leakage detectorT+M Instruments TM90061 Ultrasonic Leak Detector Cool Sense MikeTM-90061 Ultrasonic Leak DetectorTM90061 Ultrasonic Leak Detector

Ultrasonic Leak Detectors can be used for a wide variety of tests including airborne measurements for gas leaks, compressed air, steam traps, bearings, pump cavitation detection, vehicle windscreen leaks, window and roof leaks etc.

Test and Measurement Instruments Africa.
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Multi Gas Detector with all Alarms for 4  gasses:     O2, CO, H2S, %LEL.  Audio, Vibrate and Visible alarm set Points, Re-chargeable Batt. One button operation.

R18,950.00 Excl VAT


Altair_Pro_ Gas_Monitor
Multigas Detector for 4 gasses by Honeywell BW TechnologiesBW Technologies by Honeywell, 4 gas Multi gas Monitors with Alarms Fm Jim at R8200 or Pinaccle Instruments Cheaper.

Brand Names



Air Quality Meters

Alcohol Breath Tester

Alignment Equipment

AM & FM Signal Generators


Appliance Testers

Audio Generators

Audio Impedance Meter


Automotive testers



Batteries for Equipment

Battery Analyser /

Battery Desulphator Charger

Bench DMM’s


Bread Boards

Breath  Alcohol Tester

Cable Fault Locators

Cable Height Meter

Cable Testers


Capacitance meters

Carbon Dioxide meters

Carbon Monoxide meters

Car Testers

Caster / Camber Gauges

Chlorine Meter

Clamp meters

Clearance Sale:

Colour Analysers

Combination Combo Meters

Concrete Testing

Conductivity  / TDS meters

Contact Tachometers

Continuity Tester

Controller / Monitors

Corner Weight Scales

Coronavirus COVID-19

Current Meters, Bench Type

Data Acquisition Systems

Data Loggers

Decade Boxes

Dew Point Meters

Digital Vernier Calipers

Digital Scales

Digital Multimeters , DMMs

Dissolved Oxygen Meters

Distance Meters

Drain Pipe Camera

Drug Testing

Dust Monitoring

Earth resistance meter

Earth Leakage Tester, ELCB

Educational Systems

Electrical Connectors

Electromagnetic Field Testers

Electrostatic Field Tester

EMF tester

Explosives Testing

Eye Tracker

Field Strength Meters

Force gauge

Frequency Counter

Function Generators

GSM Controller

Gas leak detector

Green Hybrid Power

Grid Dip Meter

Hardness tester

Helicopter IR Gimbals

HV(High Voltage) Testing

Humidity meter


Inductance Decade Box

Infrared Thermometers

Infrared Thermography


Insulation tester

Laser Levelling

LCR meter

Leakage Clamp Meters

Logic Analyser

Logic Probes/Pulsers

Lux meter, (Light meter)


Metal Detector


Micro-Ohm Meters

Microwave Leakage

Milliohm meter


Moisture meter


Night Vision Equipment

Optical Gas Imaging OGI Thermal Cameras

ORP meter


Oxygen Meters

Pattern generators

Panel meter

PC-Based Instruments

Pen type tester

pH Meters and Probes

Pipe Inspection Camera

Photo Tachometer

Power analyzer

Power clamp meter

Power Supplies

Pressure/Vacuum meter

3 Phase Rotation Tester

Pressure Transducer

Probes, Oscilloscope

Protection Relay Testing

Proximity sensor

Racing Equipment

RCCB tester

RCD, RCCB Testers

Radiation Testers


Renewable Energy

RF Generators

Resistance Decade Box

Roughness tester


Salt meter

Satellite Testing Equipment


Scales, Digital

Shore Hardness Tester


Soil Moisture Meters

Soil pH meter

Solar Power Meter


Sound level meter

Spectrum Analyser


Student Bench Meters

Stun Guns

SWR / RF Power Meters


TDS / Conductivity Meters

Test Leads

Thermal Cameras– Long Distance –20Kms

Thermal Imagers



Thermography Courses

Thickness Testers

Tone Generator/ Tracer

Tools - Hydraulic Crimp

Torque meter

Torque wrench

Transformer Testing

Transient Suppressors


TV & Satellite Meters

Turbidity Meter

Ultrasonic Flaw Detector

Ultrasonic Thickness

UV Corona & IR Cameras, Combined

UV light meter

Vacuum meter

Variable Transformers

Verniers, Micrometers

Vibration meter

Video Scope

Watt meter

Water Tester

Water Testing Meters

Weather Station

Vacuum/Pressure meter

Voltmeters, Bench Type

Voltage Detectors

Voltage Regulators

5 Way® Binding Posts

Voltage Stabilisers

XRF Analysers

All brands, trade names, trade marks, and logos are the property of their respective owners.

T + M®                      




Time Group




Superior Electric


S.E.W. Standard Electric Works

New Acoustic Imaging Camera for Air Leaks and Partial Discharge Detection.  Fast and Easy operation. Auto saving to cloud for analysis and reporting.


FLIR Si124 Acoustic Imaging Camera for Air & Partial Discharge Detection.FLIR Si124 Acoustic Imaging Camera for Air & Partial Discharge Detection.FLIR Si124 Acoustic Imaging Camera for Air & Partial Discharge Detection.

X616 Multi Gas Detector with all Alarms for 4  gasses:     O2, CO, H2S, %LEL.  Audio, Vibrate and Visible alarm set Points, Re-chargeable Batt. One button operation.

R14,500.00 Excl VAT    TB Confirmed

T + M

X616 Multi Gas Detector.

Handheld Methane Gas Detector up to 150m. Fast Response with Alarm. Responds only to Methane, not water vapour. Colour LCD screen of gas concentration. Advanced Technology.

T + M

RLD60 Methane Gas Laser. Hanwei. HRLD600
RLD60 Methane Gas Laser. Hanwei. HRLD600RLD60 Methane Gas Laser. Hanwei. HRLD600X616 Multi Gas Detector.X616 Multi Gas Detector. Hanwei. BX616. hwsensor dot com

Ph:   +27 (011) 683 4365 / 6 / 7

E-mail: sales@instrumentsgroup.co.za






Physical   Address:              

3 Angelica Ave,

Glenvista, Johannesburg, 2091



Postal Address:

As Above.

011 683 4365
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Part No   TM-GC310

Multi Gas Detector with all Alarms for 4  gasses:     O2, CO, H2S, %LEL.  Audio, Vibrate and Visible alarm set Points, Self Test. 200Hrs LI-Ion Re-Chargeable Battery.

R 10,250.00 Excl VAT

T + M

T+M Instruments TM-GC310 Gas Monitoring InstrumentT+M Instruments TM-GC310 Gas Monitoring Instrument - cce-china dot comT+M Instruments TM-GC310 Gas Monitoring Instrument
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Also: Thermal Imagers

FLIR TG267 Thermal Imagng Spot Non Contact Thermometer