A Leading South African Test and Measurement Instruments Supplier

“For Good Measure”®

Please contact us by phone, fax, email or visit us at the details given above. We look forward to hearing from you.

Product List

T.M.I.

Test and Measurement Instruments C.C.

          CK 1985/007464/23

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

TMI, Established—1982

TMI Tester

Please note our new Address.

English, Afrikaans and Portuguese   Speaking

Master/Visa Credit Cards

Rheostats and Student Meters

Student Rheostats

Part No   BXS Series

Models for : 160, 320, 640 VA with resistance values from 0.1 ohm to 5000 ohm. O t0 380V AC, 400VDC. Enclosed in robust steel metal cover.

Part No:  BXD Series

Models for  160VA, 320VA, 640VA, 800VA with resistance values from 0.1 ohm to 5000 ohm. O to 380V AC, 400VDC.  Fuse safety socket. Robust metal cover.

T + M®

T + M®

T+M BXD Rheostats T+M BXS Rheostats T+M BXS Rheostats T+M BXD Rheostats T+M BXD Rheostats T+M BXS Rheostats
T+M BXS Rheostats T+M BXD Rheostats

Notes on Rheostats and Potentiometers.

Potentiometers, rheostats and trimmers are three-terminal resistors that are used to measure or divide voltages, and to protect or control circuits. Potentiometers are variable resistors that are adjusted with a knob or dial. Rheostats and trimmers are types of potentiometers. With a rheostat, a third “wiper” terminal is shorted to one of two fixed terminals. The wiper terminal has a resistance which varies with its position, and the two fixed terminals are connected by a fixed resistance. Trimmers are factory-set devices that require infrequent adjustments. They feature a slotted, actuator-type style and can be adjusted with a special tool or screwdriver. Other types of potentiometers, rheostats and trimmers are also available. These include standard potentiometers, mechanical devices in which the output resistance is set by a shaft; and digital potentiometers, which set an output resistance by sending a digital signal through an electrical interface.  

Potentiometers, rheostats and trimmers carry specifications for potentiometer category and actuator configuration. Industrial-grade potentiometers are protected by an enclosure, typically one that is rated by the National Electrical Manufacturers Association (NEMA). Typically, industrial-grade products are gear-driven and have connector outputs. These potentiometers, rheostats and trimmers resist the ingress of dirt and dust, and last longer than unenclosed potentiometers. Discrete-board components, another potentiometer category, are also commonly available. In terms of actuator configuration, choices include single-turn, multi-turn, and slide. With single-turn devices, the shaft rotation is limited to less than or equal to 360 degrees. By contrast, multi-turn potentiometers, rheostats and trimmers can be rotated multiple times, with as many as 15 or 20 turns from stop to stop. Slide-actuated products require the user to move a handle instead of rotating a knob.  

Potentiometers, rheostats and trimmers differ in terms of construction, mounting or packaging, performance specifications and features. Choices for construction include ceramic composition, carbon composition, carbon film, cermet, thick film, thin film, metal alloy, metal film, and metal oxide. Wirewound resistors are also available. There are many mounting and packaging styles for potentiometers, rheostats and trimmers. Choices include surface mount technology (SMT), bolt-on or chassis, panel mount, through-hole technology (THT), axial leads, gull-wing leads, J-leads, radial leads, screw terminals and tab terminals. The most important performance specifications to consider when selecting potentiometers, rheostats and trimmers include resistance range, tolerance, operating alternating current (AC) voltage, operating direct current (DC) voltage, and operating temperature.

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

Please Note:  Orders for the above items can only be accepted for quantities of 10 or more units either in model numbers or as a mixed batch, and a deposit will be requested.

Copyright  © 2009—2017 Test and Measurement  Instruments C.C.   |  All rights reserved

Rheostats Student Meters

T + M ®

New

TMI divide lineTMI divide lineTMI divide lineTMI divide lineT+M InstrumentTest and Measurement Instruments C.C.T.M.I. T+M
Lutron Instrument ElektroPhysik EZ Digital Fluke InstrumentT + M Yokogawa Instruments TMI InstrumentsSA Flag on TMI site
Promax Electronics

Clearance Sale:

Excess Stock to be cleared while stocks last. >   Click for More...

Flir Infrared Thermometry
Time Group High Time TechnologyLodestar Electronics Acute PC-Based Instruments from Test andMeasurement Instruments C.C.Intercomp "For any Measure"MSR ElectronicsSuperior Electric Powerstatk and h educationalT.M.I.T+M Products

T + M ®

New

Test our Service and           

Measure with our                 

Instruments.

FaceBook TMITwitter TMI
Test and Measurement Instruments Africa.TMI Pagerank
index sitemap advanced

Brand Names

Accessories    

Adaptors

Air Quality Meters

Alcohol Breath Tester

Alignment Equipment

AM & FM Signal Generators

Anemometers

Audio Generators

Audio Impedance Meter

Automotive testers

Balances

Barometers

Battery Analyser /

Battery Desulphator Charger

Bench DMM’s

Borescopes

Bread Boards

Breath  Alcohol Tester

Cable Fault Locators

Cable Height Meter

Cable Testers

Calibrators

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

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

Dust Monitoring

Earth resistance meter

Educational Systems

Electrical Connectors

EMF tester

Eye Tracker

Field Strength Meters

Force gauge

Frequency Counter

Function Generators

GSM Controller

Gas leak detector

Green Hybrid Power

Grid Dip Meter

Hardness tester

HV(High Voltage) Testing

Humidity meter

Hygrometers

Inductance Decade Box

Infrared Thermometers

Infrared Thermography

Inverters

Insulation tester

LCR meter

Leakage Clamp Meters

Logic Analyser

Logic Probes/Pulsers

Lux meter, (Light meter)

Manometer

Metal Detector

Micrometer

Microwave Leakage

Milliohm meter

Miscellaneous

Moisture meter

Multimeter

Night Vision Equipment

ORP meter

Oscilloscopes

Oxygen Meters

Pattern generators

Panel meter

PC-Based Instruments

Pen type tester

pH Meters and Probes

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

Refractometers

Renewable Energy

RF Generators

Resistance Decade Box

Roughness tester

Rheostats

Salt meter

Satellite Testing Equipment

Security

Scales, Digital

Shore Hardness Tester

Simulators

Soil Moisture Meters

Soil pH meter

Solar Power Meter

Software

Sound level meter

Spectrum Analyser

Stroboscope

Student Bench Meters

Stun Guns

SWR / RF Power Meters

Tachometer

TDS / Conductivity Meters

Test Leads

Thermal Imagers

Thermography

Thermometer

Thermography Courses

Thickness Testers

Tone Generator/ Tracer

Torque meter

Torque wrench

Transformer Testing

Transient Suppressors

Transmitters

TV & Satellite Meters

Turbidity Meter

Ultrasonic Flaw Detector

Ultrasonic Thickness

UV light meter

Vacuum meter

Variable Transformers

Verniers, Micrometers

Vibration meter

Video Scope

Watt meter

Water Tester

Water Testing Meters

Vacuum/Pressure meter

Voltmeters, Bench Type

Voltage Detectors

Voltage Regulators

5 Way® Binding Posts

Voltage Stabilisers

T + M®                      

Lodestar

ElektroPhysik          

Promax                   

Time Group

TECPEL

S.E.W. Standard Electric Works

MSR Electronics

Superior Electric

Danatronics

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

30th anniversay of Test and Measurement Instruments c.c.

Ph:           +27 (011) 683 4365

Fax:          +27 (011) 683 4461

E-mail:     t.m.i@iafrica.com

www.instrumentsgroup.co.za

 

NEW  Address:

(from 6 January 2016)

Physical   Address:              

3 Angelica Ave,

Glenvista, Johannesburg, 2091

SOUTH AFRICA

 

Postal Address:

P.O. Box 1416,

Southdale,

Johannesburg, 2135,

SOUTH AFRICA

TMI Monthly Specials

This Month’s Special

Thermography—Thermal Imager— Infrared Camera.

FLIR E5 (120 x 90 Pixels)

 

R 19,950.00 + VAT

while stocks last. 

 

FREE Thermography

Introductory Course

Included with Lunch.

 

One Day Course.

Click  Ex-Series  for Spec.

Also: Thermal Imagers

FLIR E4 Thermal Camera