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Electronics => Beginners => Topic started by: namlu on February 14, 2015, 11:01:55 pm

Title: Plastic / metal cover for to-92 package
Post by: namlu on February 14, 2015, 11:01:55 pm
Hello.
I have to-92 package 1-wire temperature sensor. I want to make it look like this:
(http://www.labdegaragem.org/loja/media/catalog/product/cache/1/thumbnail/600x600/9df78eab33525d08d6e5fb8d27136e95/t/e/temperature_sensor_-_waterproof_ds18b20_.jpg)

Where can I find the cover on the sensor itself? How it is called? Is it some kind of shrinking material, or just plastic?

Thank you.


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Title: Re: Plastic / metal cover for to-92 package
Post by: SeanB on February 15, 2015, 05:08:14 am
That end cover is likely a custom made moulding. You can make one to protect the sensor using some adhesive lined heatshrink tube, or use some thin wall copper or steel tube and epoxy to make a tube end that will conduct heat into the sensor while protecting the sensor.
Title: Re: Plastic / metal cover for to-92 package
Post by: Andreas on February 15, 2015, 08:47:17 am
I think its more easy to buy: (if you are thinking of DS18S20 or DS18B20)

http://www.conrad.de/ce/de/product/198284/C-Control-Temperatursensor-DS18S20?queryFromSuggest=true (http://www.conrad.de/ce/de/product/198284/C-Control-Temperatursensor-DS18S20?queryFromSuggest=true)

http://www.pollin.de/shop/dt/NjkzOTM3OTk-/Bauelemente_Bauteile/Mechanische_Bauelemente/Thermostate_Thermoschalter/Temperatursensor_H_TRONIC_TS1_Kunststoff.html (http://www.pollin.de/shop/dt/NjkzOTM3OTk-/Bauelemente_Bauteile/Mechanische_Bauelemente/Thermostate_Thermoschalter/Temperatursensor_H_TRONIC_TS1_Kunststoff.html)

With best regards

Andreas
Title: Re: Plastic / metal cover for to-92 package
Post by: Seekonk on February 15, 2015, 10:42:19 am
You'll never make it as small as they do.  They are so cheap ready made, in lots of ten or more.  When I need to seal something like that I thinly coat it with hot melt glue and heat shrink around it.
Title: Re: Plastic / metal cover for to-92 package
Post by: eejake52 on February 15, 2015, 09:18:44 pm
NB that any plastic cover will significantly reduce the response time of the sensor.

On the sensor end, I have used a TO-92 heat sink, and then bent it into the shape I wanted. For the wires leading up to the sensor, plain heat shrink is fine.

Jake