Small (not quite pocket-size) diamond balance.
The most sensitive (down to 0.001g); suitable for weighing diamonds; capacity 50g (250 carat)
Download instruction manual.
To read an article about weighing and weighing machines click here.
Built-on clear folding lid
Built-in spirit level / adjustable feet
Calibration weights included
Tare (re-set zero, e.g. put a on a scoop, re-set it to zero)
Auto-power-off if it isn't used in
Soft carry case with calibration weights and tweezers
RESOLUTION / CAPACITY: 50g / 0.001g
Also switchable to carat, 100ct / 0.005ct then, automatically, 250ct / 0.01ct
SIZE: in its carrying case with accessories 6 X 6.5 X 2 inches (145 X 170 X 50mm).
The balance: 5 X 3 X 1.75 inches (130 X 75 X 40mm).
Screen size: 45mm X 15mm
POWER: two AA batteries.
10 years. This covers manufacturing faults only, it excludes normal wear and tear, bowls, trays, finishes, clasps, hinges, feet, AC adaptors and batteries; it also excludes being overloaded / dropped (e.g. error messages EEE, 0-Ld, or OUEr). The guarantee is invalid if the scale shows signs of foreign material (e.g. residues of herbs, chemicals, corrosion, spilt tea). After 1 year you must pay the postage both ways.
Inaccurate readings can be fixed by calibrating the scale, this is something that is very easy for you to do yourself with the 50g and 20g weights supplied. Giving inaccurate readings does not mean it is broken - all electronic measuring devices need calibrating every now and again, see calibrating weighing machines.
This weighing machine is not approved for use in trade and should not be used for buying and selling on a value-for-weight basis. To see legal (approved for use in trade) balances click here.
All equipment and materials must be used in conjunction with the user's skill, knowledge and experience. Under no circumstances shall QUICKTEST be liable for direct or indirect loss sustained in connection with any item. It is your responsibility to regularly check equipment against known samples, to ensure that it is working correctly.
Free gift details
If you would like one of the following free gifts with this product, select one from “Select your free gift” above.
Mechanical, Chinese Spring Balance, 20g (RRP $6.00 )
Calculator with Conversions (RRP $6.00 )
Hanging Balance 100g. (Silver) (RRP $3.00 )
QUESTIONS & ANSWERSAsk a Question
Hello - please could you tell me what the resolution is when using grains .. ie. 0.1gn or 0.01gn or 0.001gn I need a scale that can measure 0.01 grain. Thank you
Looks like you'll need a scale that reads to 0.0001g, we don't have such a scale.
Is the On Balance CTP-250 scale suitable for dynamic weighing (adding and removing small amounts of powder until you get the required weight)?
Yes you can add or remove small amounts of powder until you get the required weight (providing you don't move or bump the scale whilst weighing/adding/removing).
However, "Dynamic weighing" means the object is moving, e.g. a live animal and this scale cannot cope with that.
Hello, please can I use this scale for rough diamond or I prefer you send me the most accurate scale for rough diamond weight.
You can use the same scale for cut diamond and rough diamond, the weights are the same. This scale (the CTP-250) is the best one.