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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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Calibrators and Simulators


Part No:  CC-421

Current /Voltage Calibrator. 0 to 24 mA, (2 ranges), -199.9mV to 199.9 mV. 4 function—  Current source with reading, power and measure of 2 wire loop, mV source.

Lutron Instruments CC-421 Current/ Voltage Calibrator


Lutron Instruments CC-421 Current/ Voltage Calibrator
Lutron Instruments CC-422 Current Calibrator

Part No:  SC-942   

Sound Calibrator, 1 Khz, / 94dB & 114dB

Lutron Instruments SC-942 Sound Calibrator


Lutron Instruments SC-942 Sound CalibratorLutron Instruments CC-422 Current CalibratorLutron Instruments CC-421 Current/ Voltage CalibratorLutron Instruments CC-422 Current CalibratorLutron Instruments SC-942 Sound Calibrator

Part No:  TC-920   

Thermometer and Calibrator, Type K, -199 to 1230 degC. C/F, Data Hold , RS232 Serial Output. Large LCD display for easy Reading

Lutron Instruments TC-920 Thermometer and Temperature Calibrator


Lutron Instruments TC-920 Thermometer and Temperature Calibrator
Lutron Instruments TC-920 Thermometer and Temperature Calibrator

Fluke Models 725, 726. Two separate Channels. Measure, Source and View Process Signals, Volts, mA, RTD’s, Thermocouples, Freq., Resistance.

Fluke Instruments 700 series Multifunction Calibrators
Fluke Instruments 700 series Multifunction CalibratorsFluke Instruments 700 series Multifunction Calibrators

Fluke mA Clamp Meter Measures 20mA loop Current Accurately without Breaking Loop Reducing Downtime of Plants, with Detachable Clamp.

Fluke Instruments 771mA Process Clamp Meter
Fluke Instruments 771mA Process Clamp MeterFluke Instruments 771mA Process Clamp Meter

Fluke Models 787, 789. Combine DMM and Loop Calibrators, with Built-in 24 V Loop Supply with Optional Fluke View Software for Graphical Analysis.

Fluke Instruments 787/789 Process Meters
Fluke Instruments 787/789 Process MetersFluke Instruments 787/789 Process Meters

Notes on Thermocouples & RTD Simulators.

Thermocouple simulators and RTD simulators provide precise standard values of resistance or voltage for simulation and calibration. Thermocouples are bimetallic temperature probes used in a variety of temperature sensing applications. Resistance temperature detectors (RTDs) are wire windings or other thin-film serpentines that exhibit changes in resistance with changes in temperature. RTD simulators provide a resistance value simulating the output of a resistance temperature detector (RTD) at a particular temperature. In some cases, resistance decade boxes can be used as RTD simulators. Thermocouple simulators provide a voltage value simulating the millivolt (mV) drop output of a thermocouple at a particular temperature. Some voltage sources can be used as thermocouple simulators. 

Selecting thermocouple simulators and RTD simulators requires an analysis of performance specifications such as temperature resolution and simulation type. The types of temperature-sensing devices that can be simulated include K type thermocouples, J type thermocouples, E type thermocouples, T type thermocouples, platinum RTDs, copper RTDs, nickel RTDs, and proprietary devices. Additional considerations include number of decades and temperature coefficient, the rate at which the nominal resistance value changes as a function of temperature. With thermocouple simulators and RTD simulators, temperature coefficient is expressed in parts per million per degree Celsius (ppm/C).

Thermocouple simulators and RTD simulators differ in terms of resistance specifications and voltage specifications. Resistance specifications include resistance range and resistance resolution per step. Resolution is the digital value represented by one bit in the display of a digital measure.  For example, a decade box where one bit on the display represents 10 amps has a resolution of 10 amps. Voltage specifications for thermocouple simulators and RTD simulators include voltage range, voltage resolution per step, and voltage accuracy. Like resistance resolution, voltage resolution is the digital value represented by one bit in the display of a digital measure.  

Thermocouple simulators and RTD simulators provide many different features. Some products offer calibration that can be traced to the National Institute of Standards and Technology (NIST). Others have low values of zero, residual impedance resistance, inductance or capacitance. Programmable thermocouple simulators and RTD simulators have a computer interface for programming, control or data acquisition. Stand-alone devices are packaged in a case with binding posts. Rack mounted devices have options for both front and rear outputs.

Current calibrators serve a function of supplying current in a loop to equipment that is controllable in an effort to test the operation for it’s calibration. This is used in analog circuits and a current of 4 – 20 mA is allowed to flow through the connections, as the current will remain constant, regardless of distances apart.

T+M Instruments MS7212 Source Calibrator for Volts, mA, Ohms, freq, & TemperatureT+M Instruments MS7212 Source Calibrator for Volts, mA, Ohms, freq, & TemperatureMS7212 4-20 mA Calibrator

Calibrators for Current 4-20mA, Voltage, RTD’s,  Temperature, Frequency, Sound, Thermocouples, Resistance and others.

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Calibrators & Simulators

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Part No:  CC-422   

Current Calibrator, 0— 24mA (2 ranges), Precision current source. Drives up to 500 ohms


Part No:  MS7212  

Calibrator Source V, mA, Ohms, and Frequency. Measures: V, mA, Ohms, Frequency & Temperature. 40000 Counts, RS232 and Software

Phasing Sticks

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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

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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Also: Thermal Imagers

FLIR TG267 Thermal Imagng Spot Non Contact Thermometer