tm associates: 3678 Bassett Street Santa Clara, CA 95054 Phn: 408 727 8388 Fax: 408 727 8997 E-Mail: tony@


Ultrasonic Cleaning Systems

Ultrasonic Probes / Meters

 DI Water Systems

Ultrasonic / DI Process


    Model 2000 Ultrasonic Probe


     Reads Cavitation energy in Watts dB/m
     Detect standing waves
     Detect malfunctioning Transducers
     Discover areas blocked to Ultrasonics
     Profile tanks
     Adjust power intensity for each tank
     Monitor Ultrasonic tanks for correct operation
    Works on 20 / 40 / 80 / 120 / 170 / 200 / 300 kHz

The Model L-2000 Ultrasonic power meter consist of a B Precision Model 5390 True RMS DVM, a coaxial adaptor and a Q-1000 quartz probe. The meter has been pre calibrated at the factory and is accompanied by a calibration certificate.

The tm associates ultrasonic power meter consists of a Quartz Probe that is immersed in the liquid of the ultrasonic tank. The probe senses the energy of the actual cavitation collapse generated by your ultrasonic tank. This energy is translated into a voltage [RMS] that changes and fluctuates with the amount of energy generated. The voltage is then amplified and displayed on the meter. A Bar graph on the bottom of the digital display indicates RMS power fluctuations.

Model Q-1000 18" x.5" dia Quartz Probe 
The probe is a .5" dia. high -sensitivity Quartz Sensor for making cavitation measurements over the frequency range of 20 kHz to 470 kHz it has a high sensitivity relative to its size. It measures the cavitation in a plain parallel to its surface.  This is a realistic picture of what your part sees as its cleaned.  Other shapes and size probes are available.

Power: [dB/m Watts]
Insert the adaptor in the com / v temp ports of the meter, plug the probe into the adaptor.  Turn on the meter to AC/V and press the select button [yellow located beneath display] until the display reads dB/m this gives you the log watts/cmsq power of your ultrasonics. Set the impedance by pressing range, and toggle to the correct impedance, this will be displayed on the LCD read out and will change each time the range button is pushed , when you reach the correct impedance stop pressing the button and the unit will automatically go back to dB/m Holding the probe parallel to the bottom of the ultrasonic tank move it around the tank, you will notice a change in the reading from place to place and from second to second. This is due to the erratically fluctuating ultrasonic wave in the tank. The meter will average out the readings to give a relativity steady display.

To determine the correct impedance go to the frequency display on the dial and note the frequency, if for example your tank is a 40 kHz tank and the frequency reads 65 kHz raise the impedance input as described above so that the frequency reads 40 kHz.  This is the same impedance you would use for dB/m

RMS [Root Mean Square Voltage]
To read the powers in RMS simply press the select button until Volts appear on the display. The power will now be read in RMS Volts. The bar graph will show fluctuations on the bottom part of the display.

The meter will read frequency of the ultrasonics up to about 150 kHz. Above this range the meter is incapable of reading frequency due to sampling rate. Power readings are still accurate as they are read in a sampling mode over a time period built into the meter.  To read frequencies simply dial the meter to Hz.

Note: Probes are available in Quartz or Titanium in 18" or 6" lengths

L-2000 with both Titanium and Quartz Probe; Titanium probe is 6" the Quartx probe is 18". Both are available in either size.