Convert Lux meter to PAR meter?
Planted Tank Forums
Your Tanks Image Hosting *Tank Tracker * Plant Profiles Fish Profiles Planted Tank Guide Photo Gallery Articles

Go Back   The Planted Tank Forum > Specific Aspects of a Planted Tank > DIY


 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 06-13-2012, 04:03 PM   #1
Hoppy
Planted Tank Guru
 
Hoppy's Avatar
 
PTrader: (74/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 18,707
Default Convert Lux meter to PAR meter?

There are a lot of cheap Lux meters available now that look like they could become a hobby grade PAR meter with some modifications. Just for the fun of it I bought one. It is a Mastech LX1010BS, from Cybertech, in California, for only $14.99, $21.53 after shipping and tax. I ordered it last Saturday and it arrived yesterday, Tuesday. You can't beat that!

Here it is:


It takes a 9 volt battery, which I don't have right now, so I haven't tested it at all. I did partly disassemble the sensor though - 2 screws.


I have a LED light and a CFL-in-a-dome reflector light to calibrate it against a PAR meter. I'm guessing there will be a different conversion factor for the different types of light, but that's fine for what I want.

My requirement is to be able to use this under water, so that is the challenge. Ebay has a nice 4 inch diameter acrylic box that I could just seal the sensor in, but that has problems: temperature and atmospheric pressure changes would flex the box and probably break the seal, It would float so would be hard to push down to where I want it, it is too big for convenience. Another option is to discard the sensor housing and use a small 2 inch diameter screw top acrylic box as the housing. For the moment that is my plan.

What am I overlooking? And, is there a better way?

EDIT: To help those who don't want to read through 10 pages of frustrating failures, the final successful project starts at post #158
__________________
Hoppy

Last edited by Hoppy; 12-13-2012 at 07:20 PM.. Reason: Edit: add direction to the final successful effort
Hoppy is offline   Reply With Quote
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 10:58 PM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright Planted Tank LLC 2012