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The Sonic Meter SM1000 is a scrub-force measuring device. It is designed
to help maintain the quality and integrity of parts during cleaning cycles
in ultrasonic cleaners.Ultrasonic cleaners utilize a transducer attached
to the tank's exterior. The transducer outputs pulsating mechanical energy
at high frequencies (ultrasonic), which causes the liquid in the tank to
agitate.The agitation at this high frequency level is what gives ultrasonic
cleaners their cleaning ability. As the liquid becomes agitated, a phenomenon
known as cavitation takes place. Cavitation is the almost instantaneous
formation and implosion of small bubbles and cavities in the cleaning liquid.
As the liquid cavitates, the minute bubbles and the simultaneous implosions cause the surrounding liquid to impinge forcefully upon the surface areas of the part being cleaned. The force that the liquid applies to the area of the part is commonly referred to as the scrub-force. This scrub-force action takes place throughout the tank. However, the scrub-force can vary significantly due to the placement of the tank's transducer and the constructive and destructive interferences caused by the shape of the tank and parts being cleaned.
These process variations in the scrub-force can be referred to as hot
and cold spots in the liquid. Hot and cold spots are locations of high
and low intensity scrub-force, relative to a mean value scrub-force. These
variations can significantly alter the cleanliness or integritity of the
parts being cleaned. Some parts may not have been thoroughly cleaned for
the next process, or the stresses due to the cleaning action may have altered
the integrity of the parts. With the Sonic Meter SM1000 these process variations
can be minimized.
With the Sonic Meter's slender probe, operators can probe ultrasonic cleaners
to pinpoint areas of optimum intensity in which to place each part. The
Sonic Meter's LCD displays the intensity variations. Parts can be varied
in their z-height or their x and y positions via an adjustable array fixture.
The operator can determine the location for each part so that all parts
are placed in regions of the same specified pressure reading (scrub-force).
Or several readings could be taken and averaged to determine the mean value
scrub-force of a particular cleaner.
The Sonic Meter SM1000 measures scrub-force in units of pounds per square inch (psi). The SM1000 works with tanks that use frequencies in the range of 0-500kHz |
 Application:
 Sonic Meter SM1000 designed compactly, the T-shaped case is also easy
to handle. Operator inputs are entered via the four buttons on
the membrane keypad. The keypad allows the operator to scroll through
the menu selections that are displayed on the high contrast LCD.
Body approximately 480 g, carrying and the measurement at various places
is possible.
Real time reading samples pressure by unit psi.
Averaged reading
high/low limits
Specifications：
Bandwidth: 0-500kHz
Pressure reading: 0-130psi, error < 1.5%, over the working range.
（psi --> kPa Table）
Temperature Operating Range: -65 to 250 F or –55 to 120 C
Performance: Real time reading samples pressure every 50msec.
Averaged reading can sample 0-40 readings at sample intervals of 10msec
to 99.99sec.
Accuracy: The Sonic Meter SM1000 uses a 12bit ADC to digitize the analog signal coming
from the probe's transducer. The accuracy of the meter is +0.03psi.
Probe: Stainless steel, hermetically sealed piezo sensing element, Φ8.0ｍｍ, Ｌ＝370ｍｍ
Housing: Anodized aluminum.
I/O: Inputs via membrane keypad, output via 4X20 LCD character display.
Control inputs: high/low limits, probe setup.
Battery life (hours): The Sonic Meter SM1000 consumes current at a rate 150mA/hour.
The NiMH batteries are rated at 2500mAH.
With continuous use, the run time is approximately 14 hours.
 
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Bach type sonoreactor SR series 
