Maxiwatt circle heater

matej1006

Hello guys,

Do i need for this heater on my duet wifi expansion board PT100 or no?
link to site with heaters

https://www.hot-end.com/shop.php

dc42

No, the temperature sensor in that heater is a thermistor, not a PT100.

Dougal1957

@dc42 said in Maxiwatt circle heater:

No, the temperature sensor in that heater is a thermistor, not a PT100.

They will also do one with a PT100 (I've just ordered one).

Veti

for pt100 you will need this
https://www.duet3d.com/PT100_DaughterBoard

matej1006

what is better pt100 or thermistor
i will order soon but i need to order 4 because i building toolchanger.

matej1006

@Dougal1957 how much is with pt100
with thermistor is 11usd plus 15 shipping to slovenia

Dougal1957

@matej1006 said in Maxiwatt circle heater:

@Dougal1957 how much is with pt100
with thermistor is 11usd plus 15 shipping to slovenia

they charged me same price. but you have to ask them directly and they will pro forma invoice you strange thing is that shipping was more (but they do say on the website that international shipping will be amended) and the other thing is that it was done from there office in spain so I paid eu VAT at the time as well so shouldn't get stung for import taxes but we will see. If you are getting 4 the shipping will be split between them I guess.

Veti

@matej1006 said in Maxiwatt circle heater:

what is better pt100 or thermistor

lots of article on the web about that.
https://blog.wika.com/knowhow/pt100-pt1000-or-ntc-which-is-the-right-measuring-element/

dc42

Also https://duet3d.dozuki.com/Wiki/Temperature_sensors.

deckingman

I used to have a PT100 (4 wire) on my bed but it was always "noisy". The result of that "noise (about +_ 1 degree) the bed temperature would always be controlled at about 1.5 degrees higher than the set temperature. Changing it to an E3D cartridge thermistor cured the noise problem and bought the controlled temperature down to the set temperature. Having said that, on my Duet 3 with the same cartridge thermistor but slightly different cable routing, I had a noisy signal again. In the end I cured that by using screened cable. My take on it is that using a more accurate sensor is only valid if the signal condition is noise free.

matej1006

This post is deleted!

matej1006

@Dougal1957 and is better then thermistor