A Leading South African Test and Measurement Instruments Supplier

“For Good Measure”^®

Please contact us by phone, 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

English, Afrikaans, Portuguese Speaking. Master/Visa Credit Cards

Digital Tachometers

Tachometers

Part No: DT-2234BL

Photo Type with Laser, 10 to 99,999 RPM , Up to 2 meters detecting Distance, 0,05% Accuracy, microprocessor based, crystal timebase high precision.

R 4, 300.00

Excl VAT

Lutron Instruments DT-2234BL Photo Type Tachometer with Laser

Part No: DT-2230

Mini Type, Photo + Contact Tachometer, Photo with laser: 5—100,000 RPM, Contact: 5 — 19,999RPM, m/min, ft/min, RS232

Lutron

Part No: DT-2268

Photo/Contact Tachometer, Multifunction

Lutron

Part No: DT-2235B

Contact Tachometer. 5 to 99,999 RPM with surface speed reading in Ft/min or m/min and memory.

R3,600.00

Excl VAT

Lutron

Tachometer, Panel Meter, 4 digit LED, 5 to 100,000RPM

Lutron Instruments DT-4240D Panel Meter Digital Tachometer

Accessories

Part No: PX-01

Proximity Sensor, 12 to 24 Volts, Output: 12 Volts DC, 100mV, Detecting Distance: 4 mm (Metal) (For DT2240D)

Lutron

Call for Pricing

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.

Part No: DT-1236L

Photo+ Contact + Laser, Photo, Tachometer. 10 to 99,999 RPM , Contact:0.5 to 19,999 RPM, m/min, ft/min

R 5,150.00

Excl VAT

Lutron

Part No: DT-2259

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.

Lutron

Part No: DT-2299

Combo Stroboscope / Photo Tachometer. 5 Digit LCD Display (99999). Ranges: 100 to 99,999 FPM On Strobe, and 10 to 99,999 on Photo.

Lutron

Call for Pricing

Digital Tachometers

Part No: PDT-2250

RPM Controller / Monitor. 5 to 100,000 RPM. Control Setting, Alarm Setting. Alarm and Control Relay Output, RS232 Computer Interface.

Lutron

Call for Pricing

RPM Controller / Monitor

T + M®

Detailed Products

Top of page

Clearance Sale:

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

Top of page

Go to Detailed Products

T + M®

Part No: DT-2240D

Lutron

Test our Service and

Measure with our

Instruments.

[ Back ]

Invite a Friend to this Site.

Part No: DT-2337

Tachometer Photo+ Contact ,Photo - 5 to 99,999 RPM , Contact:0.5 to 19,999 RPM, m/min, ft/min, Stroboscope: 100 to 99,990 RPM. K Type Thermometer, and Pt 100.