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“Tomorrow’s Instruments Today” — “For Good Measure” ® |
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A Leading South African Test and Measurement Instruments Supplier |
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“For Good Measure”® |
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TMI, Established—1982 |
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Test and Measurement Instruments C.C. |
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Test our Service and Measure with our Instruments. |
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CK 85/07464/23 |
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Please contact us by phone, fax, email or visit us at the details given above. We look forward to hearing from you. |
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Product List |
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All brands, trade names, trade marks, and logos are the property of their respective owners. |
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Brand Names |
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T + M ® |
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English, Afrikaans and Portuguese Speaking No Credit Card Payments yet. |
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Ph: +27 (011) 683 4365 Fax: +27 (011) 683 4461 E-mail: t.m.i@iafrica.com
Physical Address: 1st Floor, TMI House, 37 Garden St, Cnr 160 Bellavista Rd, Turfclub, Johannesburg, 2135 SOUTH AFRICA
Postal Address: P.O. Box 1416, Southdale, Johannesburg, 2135, SOUTH AFRICA
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T.M.I. |
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This Month’s Special |
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Excess Stock to be cleared while stocks last. > Click for More... |
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Thermography—Thermal Imager— Infrared Camera. FLIR i3 — Smallest , Lightest, most affordable camera “point-shoot-detect”. Introductory Nett Price of R 11 990.00 + VAT while stocks last. |
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Digital Tachometers |
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Tachometers |
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Part No: DT-2234BL |
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Photo Type with Laser, 10 to 99,999 RPM , Up to 2 meters detecting Distance, 0,05% Accuracy, microprocessor based, crystal timebase high precision. |
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R 2,050.00 Excl VAT |
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Part No: DT-2230 |
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Mini Type, Photo + Contact, Photo with laser: 5—100,000 RPM, Contact: 5 — 19,999RPM, m/min, ft/min, RS232 |
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Lutron |
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Part No: DT-2268 |
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Photo/Contact Tachometer, Multifunction |
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Lutron |
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Part No: DT-2235B |
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Contact Tachometer. 5 to 99,999 RPM with surface speed reading in Ft/min or m/min and memory. |
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R1750.00 Excl VAT |
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Lutron |
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Part No: DT-2259 |
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2 in 1, Digital Photo Tachometer with Stroboscope with wide range reading. |
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Lutron |
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Lutron |
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Part No: DT-2240D |
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Tachometer, Panel Meter, 4 digit LED, 5 to 100,000RPM |
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Lutron |
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Accessories |
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Part No: PX-01 |
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Proximity Sensor, 12 to 24 Volts, Output: 12 Volts DC, 100mV, Detecting Distance: 4 mm (Metal) (For DT2240D) |
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Lutron |
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T + M ® |
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Notes on Tachometers. Tachometers are used to measure the velocity of a rotating object. Tachometers operate on the principle that a driven motor (i.e., a motor operated as a generator) produces a voltage that is proportional to the angular velocity of the motor shaft. The proportionality constant, K that is used to translate mechanical motion into voltage has typical values of 1 to 30 volts per 1000 RPM. Tachometers are typically attached to the output shaft of DC or AC inverter motors requiring close speed regulation. The tachometer feeds its signal to a control which adjusts its output to the DC motor or AC inverter motors accordingly (called "closed loop feedback" control). Tachometers can be of both the contact and noncontact type. Common configurations for tachometers include handheld, portable, fixed, or modular. Handheld instruments are specifically for using while holding in one hand. Portable instruments have handles/case/wheels etc. to make easy to move, not necessarily held in hand to use. Fixed instruments are fixed or used in one place, for example, benchtop, panel mount etc. Modular instruments have different modules for interfacing to different sensors or input ranges. Tachometers can have batteries for full operation, not just backup. The two most important parameters to consider when specifying tachometers are operating speed range and accuracy. Operating speed range is the range of rotary speed measurement the tachometer can monitor. The accuracy is typically given in units such as ±RPM, etc. The sensor technology used in tachometers can be contact type, photoelectric, inductive, of Hall effect. In a contact type instrument the tachometer probe or sensor comes in contact with the rotating part. In a photoelectric instrument light beams, visible or infrared, are employed to measure speed. Technology may resemble optical encoders, where beam break frequency is used for speed calculation. Inductive instruments use magnetic elements to induce magnetic fields; frequency of activation is used to measure speed. Hall effect tachometers use Hall effect technology to determine rotational speed. Features common to tachometers include totalizers or counters, timers, built-in or self-calibration, and self-test diagnostics. Display configurations include analog visual indicators, digital numerical displays or graphic video displays. User interfaces and control types include analog front panels, or digital front panels or computer programmable interfaces. Some tachometers may come equipped with software for running on the hose computer. Many have network or communications interfaces. Available electrical outputs include analog voltage, analog current, analog modulated frequency, serial, parallel, and switch or alarm. |
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Part No: DT-1236L |
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Photo+ Contact + Laser, Photo, 10 to 99,999 RPM , Contact:0.5 to 19,999 RPM, m/min, ft/min |
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R 2,490.00 Excl VAT |
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Lutron |
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Part No: DT-2259 |
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Stroboscope / Photo Tachometer. Dual Type. 100 to 99,999 RPM/FPM Flashes p/m on Strobe, and 0.1 to 100,000RPM on Photo. 3 Flash adjust Ranges. |
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Lutron |
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Part No: DT-2299 |
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Combo Stroboscope / Photo Tachometer. 5 Digit LCD Display (99999). Ranges: 100 to 99,999 FPM On Strobe, and 10 to 99,999 on Photo. |
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Lutron |
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See also : Digital Stroboscope Tachometers |
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Copyright © 2009—2012 Test and Measurement Instruments C.C. | All rights reserved Digital Tachometers |