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Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
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New hygrometer - external sensor
    #7597472 -

I just received my thermo-hugrometer. Bought from ebay, not sure of the brand but the packet says e=mc2, environmental Monitoring concepts

Specs

measuring range - 20-98% RH, 0-50C(internal) -50 - 70C (external)
Display acuracy - +a3% @ 25%RH

With the sensor in my FC reads 93%, take it out and it plumits to 50% after a few minutes.

Looks like its working.

Fanned out my FC amd humidity drops to 50, takes a few minutes go get back upto 93



--------------------

PF TEK - writeup by EvilMushroom666
Lets Grow Mushrooms - RogerRabbit & RoadKills website with sample videos plus the full PF TEK video series. Alot of great information - BUY THE DVD
Cakes can and will pin! - So you think cakes suck for pins. Your wrong
Franks Simple Coir/Verm Tek
Franks Proper Pasturisation Tek
Franks Spawning To Bulk - Monotub
Professor Pinheads RTV Injection Port Tek
Foo Mans No Soak WBS Prep Tek

Edited by veda_sticks (11/05/07 06:31 AM)

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Re: New hygrometer - external sensor [Re: veda_sticks]
    #7597506 -

sweet - how much?


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the preceding was a figment of your/my imagination, a community hallucination

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Re: New hygrometer - external sensor [Re: rynobot8]
    #7597511 -

Was about £21.25 including deliver from ebay, i havnt tested it yet to see if the RH is right, the only downfall is u cant calibrate it.

Im gonna put the sensor in a tub of salt and see what it says.


--------------------

PF TEK - writeup by EvilMushroom666
Lets Grow Mushrooms - RogerRabbit & RoadKills website with sample videos plus the full PF TEK video series. Alot of great information - BUY THE DVD
Cakes can and will pin! - So you think cakes suck for pins. Your wrong
Franks Simple Coir/Verm Tek
Franks Proper Pasturisation Tek
Franks Spawning To Bulk - Monotub
Professor Pinheads RTV Injection Port Tek
Foo Mans No Soak WBS Prep Tek

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Re: New hygrometer - external sensor [Re: veda_sticks]
    #7598552 -

electronic hygrometers suffer a fatal flaw. They're ability to register accurate reads is wholly depending on the constant voltage supplied by their power-source. As almost all of these are battery powered, they're inaccuracies grow exponentially as the voltage drops over time. I have one such "weather-station" styled hygrometer in my fruiting chamber now but I only use it to read the approximate temperatures and trust me when I say, regardless of it's +/- 2% accuracy statement's it's often off by 7-10% once the humidity is over 85% or higher.

I'd recommend getting yourself a good analog hygrometer that has a calibration screw for $5-10 USD (either online or from your local cigar-shoppe) and you'll never find more accurate readings outside of buying an expensive sling-psycrometer or masons-hygrometer.

---
To calibrate an analogue hygrometer, take a small dish-towel and get it wet and wring out all excess moisture. Place it into a small tupperware-type container with a lid - one that is about the same size as the towel itself and place the hygrometer in there as well. Seal it and come back about an hour later and then take out the hygrometer and set the calibration screw so that the hygrometer reads 100% and it read true from that point on. Shouldn't need to be calibrated more than once or twice a year...


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:justdontknow: Don't mistake my tone for a "matter-of-fact" attitude.  I'm just presenting what I believe to be correct, until I'm corrected...

- How Myco-Curious Prepares Coir & Compost Substrates
- How Myco-Curious Builds A Bulk Humidifier
- How Myco-Curious Builds An Automated Greenhouse
------------------------------------
figgusfiddus said:
Keep in mind that inoculating or whatever in front of a flow hood won't help your bad substrate, your bad inoculant, your bad sterile procedure, etc. etc. etc. It's not a +3 flowhood of magic, it's just a tool.

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Re: New hygrometer - external sensor [Re: mycocurious]
    #7599050 -

In addition, the first spore drop in your growing area will coat the transducer, further degrading it's already poor performance. That's the reason we use mechanical hair hygrometers that can be re-calibrated as the internal hair stretches over time.
RR


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Download Let's Grow Mushrooms



semper in excretia sumus solim profundum variat

"I've never had a failed experiment.  I've only discovered 10,000 methods which do not work."
Thomas Edison

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Mushrooms, Mycology and Psychedelics > Mushroom Cultivation
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