Author Topic: Temp probe with SHT35  (Read 6949 times)

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Offline Platokidd

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Ambient
1-WS-5000 1-WS-2902A 2-WS40/RAIN 1-WH31L 
1-METEOBRIDGE 1-PM2.5 (WH41B) 3-WH31 1-SRX100LX

ECOWITT
2-HP2550 2-HP2560 2-GW2000 2-GW1100
2-WS68 1-WS80 1-WH32EP 10-WH31 1-WH40
1-HP10 2-WH45 4-WH55 5-WH51
1-WN30 1-WH41

1-DAVIS 7714
1-STRATUS
1-Fisher Barometer 1436R-22
PWS at 2 locations.
1- Storm Sensor-Zelda the dog ;)

Offline KD7GFL

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Re: Temp probe with SHT35
« Reply #76 on: January 18, 2022, 01:16:36 PM »
I wonder how clear and see through that clear cover lasts after a year in the sun. If you get it...please post a year from now and share a picture.


Going through some old topics and I came across this post.  As requested 18 months later: 

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CWOP: KD7GFL (AV640)
WU: KMOAUXVA6
Ambient Weather: KD7GFL

Equipment: GW1000, WS-68, WH40 (w/WH65 Funnel for improved accuracy), WH32-EP (Davis 7714), WH-31 X 2, WH-32, WH-57, HP2551-C, and an Ambient WeatherBridge.

Offline abusuzuki

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Re: Temp probe with SHT35
« Reply #77 on: February 04, 2022, 03:18:37 PM »
A very useful topic, as it shortened a lot of research for me, especially providing links to some tools from Amazon. Thank you to everyone who replied to this topic. But I have a question. Can anyone confirm whether WH32EP reads the humidity below 10%?

Offline Gyvate

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Re: Temp probe with SHT35
« Reply #78 on: February 04, 2022, 03:55:13 PM »
Specifications: WH32-EP

Power:2 AA batteries(not included)

Sensor Size: 123x42x14mm ; Cabe length: 1M/3FT

Temperature range:-10°C – 60°C (14°F - 140°F)

Temperature resolution:0.1°C, or 0.1°F

Temperature accuracy: ± 0.2°C

Humidity range: 10% ~ 99%

Humidity resolution:1%

Humidity accuracy: ± 1.8%

Sensor reporting interval: 64 seconds
WS2350 1.6.7, GW1000(3) 1.7.7,WH2650 WiFi (2) 1.7.7 (test/backup), GW1100 2.3.1, GW2000(3) 3.1.1, HP2551 1.9.5,5.1.5;HP3500 1.7.2,WS3800 1.2.8, WN1910 1.2.3,WN1980 1.2.3;
Ecowitt WS90(2)1.3.5/1.4.0, WS80(2)1.2.5, WS68, WS69, WH40, WH31, WH31-EP, WN30, WN34L, WN35, WH32, WH32-EP, WH32B, WH57 [Lightning], WH41 [PM2.5], WH51, WH45, WH55
MeteobridgePro(2)[test,prod] 5.8 Mar 01 2024, 15185 - Blake-Larsen Sun Recorder - RPi4/weewx 4.8.0/4.10.2/CumulusMX 3283/Meteobridge RPi4B-2GB(3169)
Barani Meteoshield Pro, MetSpec Rad02 - Ecowitt 5763,34418;WU ISAARB3(WH4000SE),ISAARB22(HP2553), http://meshka.eu

Offline Platokidd

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Re: Temp probe with SHT35
« Reply #79 on: February 05, 2022, 08:33:12 AM »
The sensor actually can measure from -40F - 140F(-40C ~60C) and send the data to receiver. However the screen display of the sensor might not work below 14F(-10C).
Ambient
1-WS-5000 1-WS-2902A 2-WS40/RAIN 1-WH31L 
1-METEOBRIDGE 1-PM2.5 (WH41B) 3-WH31 1-SRX100LX

ECOWITT
2-HP2550 2-HP2560 2-GW2000 2-GW1100
2-WS68 1-WS80 1-WH32EP 10-WH31 1-WH40
1-HP10 2-WH45 4-WH55 5-WH51
1-WN30 1-WH41

1-DAVIS 7714
1-STRATUS
1-Fisher Barometer 1436R-22
PWS at 2 locations.
1- Storm Sensor-Zelda the dog ;)

Offline Gyvate

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Re: Temp probe with SHT35
« Reply #80 on: February 05, 2022, 10:16:01 AM »
The sensor actually can measure from -40F - 140F(-40C ~60C) and send the data to receiver. However the screen display of the sensor might not work below 14F(-10C).
yes, but the central question was about relative humidity < 10%
WS2350 1.6.7, GW1000(3) 1.7.7,WH2650 WiFi (2) 1.7.7 (test/backup), GW1100 2.3.1, GW2000(3) 3.1.1, HP2551 1.9.5,5.1.5;HP3500 1.7.2,WS3800 1.2.8, WN1910 1.2.3,WN1980 1.2.3;
Ecowitt WS90(2)1.3.5/1.4.0, WS80(2)1.2.5, WS68, WS69, WH40, WH31, WH31-EP, WN30, WN34L, WN35, WH32, WH32-EP, WH32B, WH57 [Lightning], WH41 [PM2.5], WH51, WH45, WH55
MeteobridgePro(2)[test,prod] 5.8 Mar 01 2024, 15185 - Blake-Larsen Sun Recorder - RPi4/weewx 4.8.0/4.10.2/CumulusMX 3283/Meteobridge RPi4B-2GB(3169)
Barani Meteoshield Pro, MetSpec Rad02 - Ecowitt 5763,34418;WU ISAARB3(WH4000SE),ISAARB22(HP2553), http://meshka.eu

Offline zoomx

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Re: Temp probe with SHT35
« Reply #81 on: February 05, 2022, 03:12:33 PM »
Datasheet says that SHT35 humidity range is 0-100%

Offline Gyvate

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Re: Temp probe with SHT35
« Reply #82 on: February 05, 2022, 04:55:50 PM »
Datasheet says that SHT35 humidity range is 0-100%
@zoomx
yessir, the chip - but there is usually a different performance of the whole system, i.e. what is provided in the end. You don't hang the chip into the air with (what we call in our country) a "Siemens air hook" ;).
I'm sure that Ecowitt know pretty well why they give 10-~99% as specification for the WH32/WH31-EP (and not 0-100).
« Last Edit: February 05, 2022, 04:57:36 PM by Gyvate »
WS2350 1.6.7, GW1000(3) 1.7.7,WH2650 WiFi (2) 1.7.7 (test/backup), GW1100 2.3.1, GW2000(3) 3.1.1, HP2551 1.9.5,5.1.5;HP3500 1.7.2,WS3800 1.2.8, WN1910 1.2.3,WN1980 1.2.3;
Ecowitt WS90(2)1.3.5/1.4.0, WS80(2)1.2.5, WS68, WS69, WH40, WH31, WH31-EP, WN30, WN34L, WN35, WH32, WH32-EP, WH32B, WH57 [Lightning], WH41 [PM2.5], WH51, WH45, WH55
MeteobridgePro(2)[test,prod] 5.8 Mar 01 2024, 15185 - Blake-Larsen Sun Recorder - RPi4/weewx 4.8.0/4.10.2/CumulusMX 3283/Meteobridge RPi4B-2GB(3169)
Barani Meteoshield Pro, MetSpec Rad02 - Ecowitt 5763,34418;WU ISAARB3(WH4000SE),ISAARB22(HP2553), http://meshka.eu

Offline CW2274

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Re: Temp probe with SHT35
« Reply #83 on: February 05, 2022, 05:39:20 PM »
Datasheet says that SHT35 humidity range is 0-100%
I'm sure that Ecowitt know pretty well why they give 10-~99% as specification for the WH32/WH31-EP (and not 0-100).
Reply #10 says the 10% limitation would be eliminated. Which is it? Why have a sensor capable of 0-100% but not use it? By not going below 10%, that eliminates pretty much the entire desert SW as a considered PWS if humidity is a concern. We spend at least three months of the year with daily RH's below 10%.

Offline Gyvate

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Re: Temp probe with SHT35
« Reply #84 on: February 06, 2022, 01:57:36 PM »
Datasheet says that SHT35 humidity range is 0-100%
I'm sure that Ecowitt know pretty well why they give 10-~99% as specification for the WH32/WH31-EP (and not 0-100).
Reply #10 says the 10% limitation would be eliminated. Which is it? Why have a sensor capable of 0-100% but not use it? By not going below 10%, that eliminates pretty much the entire desert SW as a considered PWS if humidity is a concern. We spend at least three months of the year with daily RH's below 10%.
I don't mind ...
if this is so, and @Mauro63 works closely with Fine Offset/Ecowitt, so it may be.
so post #10 is interesting, but not a solid reference as long as this is not officially published.
Plus, 10% not being any more the lower limit only says, that the limit is now lower and/but not how much lower ...
It may just be "laziness" at the Ecowitt end not to update their doucmentation.
However, it hasn't been documented/updated yet on their web site / manual.
WS2350 1.6.7, GW1000(3) 1.7.7,WH2650 WiFi (2) 1.7.7 (test/backup), GW1100 2.3.1, GW2000(3) 3.1.1, HP2551 1.9.5,5.1.5;HP3500 1.7.2,WS3800 1.2.8, WN1910 1.2.3,WN1980 1.2.3;
Ecowitt WS90(2)1.3.5/1.4.0, WS80(2)1.2.5, WS68, WS69, WH40, WH31, WH31-EP, WN30, WN34L, WN35, WH32, WH32-EP, WH32B, WH57 [Lightning], WH41 [PM2.5], WH51, WH45, WH55
MeteobridgePro(2)[test,prod] 5.8 Mar 01 2024, 15185 - Blake-Larsen Sun Recorder - RPi4/weewx 4.8.0/4.10.2/CumulusMX 3283/Meteobridge RPi4B-2GB(3169)
Barani Meteoshield Pro, MetSpec Rad02 - Ecowitt 5763,34418;WU ISAARB3(WH4000SE),ISAARB22(HP2553), http://meshka.eu

Offline mauro63

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Re: Temp probe with SHT35
« Reply #85 on: February 06, 2022, 04:22:35 PM »
Datasheet says that SHT35 humidity range is 0-100%
I'm sure that Ecowitt know pretty well why they give 10-~99% as specification for the WH32/WH31-EP (and not 0-100).
Reply #10 says the 10% limitation would be eliminated. Which is it? Why have a sensor capable of 0-100% but not use it? By not going below 10%, that eliminates pretty much the entire desert SW as a considered PWS if humidity is a concern. We spend at least three months of the year with daily RH's below 10%.
I don't mind ...
if this is so, and @Mauro63 works closely with Fine Offset/Ecowitt, so it may be.
so post #10 is interesting, but not a solid reference as long as this is not officially published.
Plus, 10% not being any more the lower limit only says, that the limit is now lower and/but not how much lower ...
It may just be "laziness" at the Ecowitt end not to update their doucmentation.
However, it hasn't been documented/updated yet on their web site / manual.

I will take care to check this limit and update you as soon as the Fine Offset technicians return from the current holidays in China
Surely it is a typo, if it was not and I do not see technical problems to take advantage of the integral performance of the sensor, I will check if it can be solved through a simple firmware upgrade

Good continuation to all

M.

Offline mauro63

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Re: Temp probe with SHT35
« Reply #86 on: February 07, 2022, 02:43:35 AM »
Hi everyone,

I can confirm that this is a mistake that will be corrected as soon as possible, actually the wh-32 EP displays and works correctly in the 1-99% range

Good continuation

M.

Offline hiljo

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Re: Temp probe with SHT35
« Reply #87 on: February 07, 2022, 04:57:53 AM »
I can confirm that this is a mistake that will be corrected as soon as possible, actually the wh-32 EP displays and works correctly in the 1-99% range

Thanks Mauro. Question: A mistake in the manual, of in de software/firmware?  :?:
Ecowitt HP2550C v1.9.3
2x GW2000 v3.1.1
WittBoy WS90 v1.3.8
Smart Sensors (WFC01 & AC1100) beta tester
3x WH31, WH32, WH40, WH41, WH57
WN34L, 2x WH51, WN35, WN34D

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Offline mauro63

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Re: Temp probe with SHT35
« Reply #88 on: February 07, 2022, 07:48:46 AM »
I can confirm that this is a mistake that will be corrected as soon as possible, actually the wh-32 EP displays and works correctly in the 1-99% range

Thanks Mauro. Question: A mistake in the manual, of in de software/firmware?  :?:

No, this is only a mistake relating to the manual and the technical characteristics declared online
thanks for your request

M.

Offline RRphoto

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Re: Temp probe with SHT35
« Reply #89 on: December 21, 2022, 04:42:14 PM »
Hello, I would like to buy an Ecowitt WH-32EP and a waterproof box.
What is the diameter of the SHT35 probe? The box needs a relevant hole in size for passing the probe itself through.

Second question: what is the safe box height to fit the Ecowitt WH-32EP?

Third question (for Italian users): I have seen some AMZN.com links for waterproof boxex in this thread, are there similar products in the italian store?

Thank you.

Offline davidefa

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Re: Temp probe with SHT35
« Reply #90 on: December 21, 2022, 05:08:37 PM »
You can search for 'scatola derivazione trasparente'
For example this should fit the sensor ( inner measures 132mm x 80mm ), can't say anything about quality: https://www.amazon.it/QWORK-Derivazione-Impermeabile-Coperchio-Trasparente/dp/B08XNMZF2V/ref=sr_1_7?crid=2N68THE3TJ28M&keywords=scatola+derivazione+trasparente&qid=1671659689&sprefix=scatola+derivazione+tra%2Caps%2C123&sr=8-7

 

anything