It is always par par par

[chicago]

Does the apex ever have to be calibrated ?

 

[Dana Riddle]

All PAR meters need calibration after a few years' use. This can be due to 'fogging' of the sensor's window. For our (hobbyists) purposes the drift in the reading will be small. There is also some drift in the electronics, if I understand it correctly, but this is outside of my wheelhouse.

 

[chicago]

Demonstrating my stupidity. Even after 40 years of salt water tanks and equipment. .. to calibrate . How is that done. I did a search for apex and can’t find anything. Maybe the Neptune forum
Has some info. My Neptune pmk has been in the tank for four plus years. Cleaned off and on and never really paid attention to it to much .

 

[Dana Riddle]

Demonstrating my stupidity. Even after 40 years of salt water tanks and equipment. .. to calibrate . How is that done. I did a search for apex and can’t find anything. Maybe the Neptune forum
Has some info. My Neptune pmk has been in the tank for four plus years. Cleaned off and on and never really paid attention to it to much .

My Neptune sensor is just a few months old, and I check its measurements against an Apogee MQ-510, and they are spot on.

 

[chicago]

Dana. Is the mq-510 mich better than the older my-200. I recall. The my-200. Was not really made for under water ? Thanks

 

[Dana Riddle]

Dana. Is the mq-510 mich better than the older my-200. I recall. The my-200. Was not really made for under water ? Thanks

I'm biased. LOL. I did some free consulting work when Apogee was designing the 510. The sensor is improved and can 'see' the spectrum better (especially LEDs) and thus report a more accurate number. The correction for the immersion effect is also automatically calculated. Now, with that said, the MQ-200 is a serviceable meter if manual corrections are made.

 

[chicago]

I'm biased. LOL. I did some free consulting work when Apogee was designing the 510. The sensor is improved and can 'see' the spectrum better (especially LEDs) and thus report a more accurate number. The correction for the immersion effect is also automatically calculated. Now, with that said, the MQ-200 is a serviceable meter if manual corrections are made.

 

[chicago]

Thanks Dana. Appreciate the info. It’s been awhile since I I delved into par. Tank crash two years ago. Ick. Had to hypo. and and pulled out half my rock and gave away mother colonies to local shops in chicago. Now getting back up and running after two years . I just looked at the sensor on the apex. All black no writing. Plan will be to find the manual corrections on the apogee and see what comes of it. I like to have the right tools so I see me dropping the coin for the 510 sooner or later.. thanks for your input.