I have a sensor TSL235R - LIGHT-TO-FREQUENCY CONVERTER, datasheet - http://www.rhydolabz.com/documents/sensors/TSL235R_LF.pdf

It provides linear response of ambient irradiance to output frequency. How can I measure this output frequency with a datalogger ?

CP

I found information about measuring frequency and period in DT5xx FAQ section.

This page tells that the maximum frequency that can be measure is 20 kHz, and minimum is 33 Hz. Can a analog port be used as described to measure the frequency output from light to frequency converter.

Or low speed and high speed counters are to used ?

Hi Chintanp,

Yes you can use the Analog channel to measure frequency, with the frequency range you can reduce the gate time to increase the frequency

But i looked at the specs on you sensor , the output frequency range is 200 to 300 kHz

f Output frequency Ee = 430 μW/cm2, λp = 635 nm 200 250 300 kHz

if you use the High speed counter channel on dataTaker the typical frequency it can measure is up to 100 kHz

Regards
Lokesh