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When a particle is present it scatters the incident laser light which is detected using a 60-degree solid angle elliptical mirror at right angles to the laser beam
An integral pressure transducer measures liquid depth to determine flow area
such as wind
A Styrofoam ball turning pink or light blue
This model has
Testo 400 Indoor Air Quality IAQ / HVAC Monitor Municipal When a particle is presentThe Testo 400 allows rapid measurement with accurate temperature probes. The instrument can extrapolate the final value for faster response times. It has the highest precision due to system calibration (measuring instrument + probe). The measuring instrument and the display are integrated within the probe, which is where the calibrated data is saved. The Testo 400 is a very practical one hand operation with no awkward cable connections. It is a robust
US$ 58.00
US$ 32.95
US$ 32.00
