FAQ: Ultrasonic Power & Measurement

Q1: Is a measurement of 15mV considered "pass" or "qualified"?
A1: Since every ultrasonic machine varies in frequency and power, the sound pressure value primarily reflects the current baseline of your specific unit.

• If cleaning performance is satisfactory at 15mV, it can be considered qualified for your process.

• If cleaning results are poor, we recommend discussing the data with the equipment manufacturer to check for potential hardware issues.

Q2: Does a higher frequency lead to a higher sound pressure reading?
A2: Yes. Higher frequencies have shorter wavelengths, resulting in a higher "impact frequency" against the probe. This increased accumulation of energy typically leads to a higher measured sound pressure value.

Q3: How deep and where should I place the probe for the best results?
A3:

• Location: The center of the tank is usually the most stable zone. We recommend measuring at the geometric center for consistency.

• Depth: An immersion depth of 30–100mm is ideal. Crucial: Always maintain the exact same depth for every measurement to ensure data accuracy.

• Angle: Tilting the probe at approximately 10 degrees while submerged can further improve measurement stability.

Q4: Why is the green light on the panel flashing?
A4: This indicates that the built-in battery is low. It is time to recharge the device.

Q5: Why isn't the measured sound pressure always proportional to the machine's power consumption?
A5: Sound pressure is influenced by multiple environmental variables, not just output power.

• Case 1: Tank Material Matters

  • Scenario: A 28KHz/1800W unit in a Stainless Steel tank reads 22mV. The same unit in a PP (Plastic) tank reads only 10mV.

  • Reason: Stainless steel reflects ultrasonic waves efficiently, keeping energy in the water. PP absorbs and dampens the waves, lowering the reading.

• Case 2: Load Interference (Baskets & Parts)

  • Scenario: Adding a cleaning basket and products can cause a reading to drop from 22mV to 15mV.

  • Reason: The basket and workpieces absorb and "split" the ultrasonic energy, naturally reducing the sound pressure in the liquid.

• Case 3: Frequency Shifts

  • Scenario: Switching from 28KHz to 40KHz (keeping power and material the same) might increase the reading to 28mV.

  • Reason: Higher frequency means more impacts per second, which often registers as higher sound pressure.

Summary: Sound pressure readings depend on a combination of tank material, loading (baskets/parts), frequency, and tank resonance. For the same machine, changing any environmental factor will change the measurement results.