<p>Best reference would be the original equipment manufacturer (Antclabs). It appears their sensor has had many <a href="https://www.antclabs.com/version" rel="nofollow noreferrer">versions</a>:</p>
<p><a href="https://i.sstatic.net/0HwKu.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/0HwKu.png" alt="enter image description here" /></a></p>
<p>So, from 3.0 to 3.1 is a software upgrade. Reported highlights are:</p>
<blockquote>
<p>★ Smart V3.0 (Mar. 2019 ~ ) : S10, S60, S90, S120, S140, S150, S160,
PWM Wiring defect indication(Blue LED), QR, Molex 1.25, Plastic
Push-pin(PC), Power Wiring defect indication(Red LED)</p>
<p>★ Smart V3.1 (Mar. 2019 ~ ) : S10, S60, S90, S120, S130, S140, S150,
S160, PWM Wiring defect indication(Blue LED), QR, Molex 1.25, Plastic
Push-pin(PC), Power Wiring defect indication(Red LED)</p>
</blockquote>
<p>If you look at the manuals you will see the differences:</p>
<p>V3.0
<a href="https://i.sstatic.net/pJsjD.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/pJsjD.png" alt="enter image description here" /></a></p>
<p>V3.1
<a href="https://i.sstatic.net/ykPvN.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/ykPvN.png" alt="enter image description here" /></a></p>
<p>As can be seen, timings are different and more PWM position G-code options are available in the V3.1.</p>

CC BY-SA 4.0
2020-11-04T10:05:34.717Z
2020-11-04T10:05:34.717Z
0scar
<p>I couldn't find a reliable source listing the improvements of BLtouch 3.1 vs 3.0.</p>
<p>I can see that BLtouch 3.0 is sold (original) for about 20 Euro, while 3.1 costs about 30 Euro. The difference is significant.</p>
<p>What are the improvements?</p>

<bltouch>
What are the changes between BLtouch 3.0 and 3.1?
FarO
# What are the changes between BLtouch 3.0 and 3.1?

(Asked by: username_0 on 2020-11-04)

I couldn't find a reliable source listing the improvements of BLtouch 3.1 vs 3.0.

I can see that BLtouch 3.0 is sold (original) for about 20 Euro, while 3.1 costs about 30 Euro. The difference is significant.

What are the improvements?

**Tags:** bltouch


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## 1 answers

### Answer by username_1 on 2020-11-04. Score: 0 | Accepted answer

Best reference would be the original equipment manufacturer (Antclabs). It appears their sensor has had many [versions](https://www.antclabs.com/version):

[![enter image description here](https://i.sstatic.net/0HwKu.png)](https://i.sstatic.net/0HwKu.png)

So, from 3.0 to 3.1 is a software upgrade. Reported highlights are:

> ★ Smart V3.0 (Mar. 2019 ~ ) : S10, S60, S90, S120, S140, S150, S160,
> PWM Wiring defect indication(Blue LED), QR, Molex 1.25, Plastic
> Push-pin(PC), Power Wiring defect indication(Red LED)
>
> ★ Smart V3.1 (Mar. 2019 ~ ) : S10, S60, S90, S120, S130, S140, S150,
> S160, PWM Wiring defect indication(Blue LED), QR, Molex 1.25, Plastic
> Push-pin(PC), Power Wiring defect indication(Red LED)

If you look at the manuals you will see the differences:

V3.0
[![enter image description here](https://i.sstatic.net/pJsjD.png)](https://i.sstatic.net/pJsjD.png)

V3.1
[![enter image description here](https://i.sstatic.net/ykPvN.png)](https://i.sstatic.net/ykPvN.png)

As can be seen, timings are different and more PWM position G-code options are available in the V3.1.


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