Pyroelectric anemometers: Experimental geometric considerations

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Abstract
The role of geometric factors in the operation of a modified design of the pyroelectric anemometer is examined. The two major variables were chip thickness d (133 and 205 μm) and the separation between the heater and the measuring electrodes (25≤ΔHE≤250 μm). The overall flow response varied as (flow) 0.48±0.02 for almost four orders of magnitude. No evidence of saturation was observed at either the high or low flow rates. One of the more interesting results obtained was the relative independence of the response at fixed flow rate on ΔHE for d=133 μm. Even for d=205 μm, the response was relatively independent of ΔHE, though some variation was observed.

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