NZ Darknet Market Forums

LittleIndian

Member

Registered: 2019-10-09

Posts: 97

Looking for accurate Scales

Any recommendations out there for accurate measuring smaller doses of like 10 mg -> 30 mg

I find my current ones struggle to register the smaller amounts.

hhhman

Member

Registered: 2021-08-24

Posts: 31

Re: Looking for accurate Scales

A few years ago  the recommended scale on DNM forums was AWS Gemini-20. Great for measuring out 15mg doses for example.
There might be a better/newer model now though.

chitty

Member

Registered: 2022-02-12

Posts: 84

Re: Looking for accurate Scales

I just got a 1mg chemical balance from aliexpress, JA103P 100g version, it was ~$300 including the rather high shipping price. Have only used it once and it didn't seem a lot more responsive than the previous mg scales I got from a headshop for $170. Like you said, struggling to register the smaller amounts. I might post back again after using the new chemical balance some more if it seems like it was at all worth the extra $$ over cheaper mg scales.

One thing I found while researching is that if you are looking for measuring small quantities then a scale with a lower maximum measuring weight is more likely to be accurate at small quantities. For best accuracy scales should be calibrated accounting for the earth's magnetic field (so you need to operate them in the same orientation each time?) and given 20 minutes to heat to room temperature. But the problem with the small amounts is that the scales don't seem to move/change reading until you've loaded another 7mg+ onto them so maybe not a big deal for us.

To be really good for 15mg amounts you'd want 0.0001g scales, now those are starting from $700 on aliexpress including shipping and tax, which is sort of tempting and prices will just always keep dropping anyway.

Edit: just had another go with the aliexpress JA103P, it didn't budge from 0 until I'd piled on a pile (aiming for 10mg) that I knew way over and then the reading changed to 22mg, when I weighed the pile on my old scales to check it said it was 62mg, so it looks like those were a total bomb

Last edited by chitty (2022-05-26 17:10)

chitty

Member

Registered: 2022-02-12

Posts: 84

Re: Looking for accurate Scales

These guys are recommending the AWS gemini-20 or dia-20, the thread's from 2020 though:
https://bluelight.org/xf/threads/uk-mg-scales.888509/
https://awscales.com/milligram-scales/

I got the 50g capacity "NZ Digital Scale NZ-CT-50 50 X 0.001G" from nzscales.co.nz before I found out that lower maximum capacity is related to better precision at lower weights, should have got the "NZ Digital Scale NZ-FB-20 20 X 0.001G", but here's the DIA20 https://www.wic ked habits.nz/category/scales-0-001g

Last edited by chitty (2022-05-29 10:50)

chitty

Member

Registered: 2022-02-12

Posts: 84

Re: Looking for accurate Scales

I just received a DIA20 (which was $95) and immediate impression after unboxing was it's small and shitty and tacky compared to my much better built "NZ Digital Scale NZ-CT-50 50 X 0.001G" (which was $170, or $150 on the nzscales site), and it doesn't have an indicator bubble to help you level it on your surface. I started cutting up a piece of plastic letting the pieces drop onto the scale to see how its response was and the readout finally changed after quite a few pieces had dropped onto the weighing platform, to 15mg. I dropped the pieces onto my NZ-CT-50 50 and they weighed at 19mg. I think normally my NZ-CT-50 50 would react after about 7mg, virtually always <10mg, on the weigh plate.

I may post more details after I've tested it some more. The DIA20 is very small if you want portability badly. I just noticed that the two models of 50g nzscales 0.001g scales have a bubble so you can orient them flat while I can't see one in the pictures of the nzscales 20g 0.001g scales... so possibly the 50g ones are better (from researching having scales perfectly level is important for accuracy).

Handy link: Linearity, Maximum and Minimum Accurate Weighing
https://laboratoryresource.com.au/?navaction=getitem&id=28

Last edited by chitty (2022-07-22 23:20)