Signet Si-Pin
Trace detection down to ppm in a lighter 25 kg benchtop unit - the Signet for smaller floors and wider element questions.
Gold Testing & XRF Analyzers · Signet XRF
Signet FSDD — XRF Gold Analyzer
The higher-resolution benchtop analyzer in the Signet range - 72-element coverage for high-purity gold verification.
| Detector | Silicon PIN |
|---|---|
| Resolution | 145 +/- 15 eV |
| Analysis range | 1% - 99.99% Au |
| Accuracy | +/-0.03% Au |
| Measurement objects | Solid, powder, liquid |
Specifications
Signet FSDD technical parameters
| Detector | Silicon PIN |
|---|---|
| Resolution | 145 +/- 15 eV |
| Analysis range | 1% - 99.99% Au |
| Accuracy | +/-0.03% Au |
| Measurement objects | Solid, powder, liquid |
| Elements | Up to 72 kinds of elements |
| Test time | 10-60 s; approx. 40 s for best results |
| High voltage | 9-50 kV |
| Light tube flow | 0-100 uA |
| Sample chamber | 360 x 298 x 86 mm |
| Instrument size | 618 x 418 x 315 mm |
| Net weight | Approx. 40 kg |
| Power input | 230V / 50Hz |
| Operating temperature | 0-35 degrees C |
| Operating humidity | Below 70% |
Who this machine is for
Manufacturers and refiners whose work is primarily high-purity gold verification, and who need element coverage well beyond the precious metals.
Not sure this is the right model?
Send us your designs and target output. We will tell you honestly whether this machine, a smaller one, or a larger one fits — including when the answer is "you don't need this yet".
Alternatives
Other models in this range
Signet-PC
A further unit in the Signet XRF family, listed in the catalogue alongside the FSDD and Si-Pin.
Portable Gold Tester
Gold verification away from the bench - with one power requirement you need to know before you buy.
Answers
Signet FSDD questions
How accurate is the Signet FSDD?
Catalogue-specified at +/-0.03% Au, analysing from 1% to 99.99% Au. For best results the catalogue specifies roughly a 40-second test, within a 10 to 60 second range - shorter tests trade precision for speed, which is usually the right trade at a retail counter and the wrong one before a melt.
Does XRF testing damage the piece?
No. XRF is non-destructive - the sample sits in the chamber and is analysed without cutting, scraping or dissolving it. That is why it suits finished jewellery, incoming scrap and customer walk-ins equally.
What environment does the FSDD need?
It is specified for 0-35 degrees C ambient temperature and humidity below 70%, on a 230V/50Hz input. Keep it out of direct heat and well away from polishing dust - fines drawn into a sample chamber are the most common avoidable cause of drifting results.
Can it test powder and liquid as well as solid gold?
Yes - the FSDD is catalogue-specified for solid, powder and liquid measurement objects.
How much floor space does the Signet FSDD need?
The machine measures 618 x 418 x 315 mm. It weighs Approx. 40 kg. Allow clear working space on the operator side, plus access for any support equipment — compressor, air dryer or water chiller — when planning your layout.
Does the Signet FSDD come with installation and training?
Yes. We commission the machine on your floor and train your operators on your own material and your own designs rather than a demonstration sample. Semsons Tech has served the diamond and jewellery industry since 1978, and on our setting machines the control system is self-developed, so support does not depend on a third party abroad.
What is the delivery time, and how are spare parts handled?
We do not publish delivery times, spare-parts pricing or AMC terms, because all three depend on configuration, destination and what is on the floor at the time. They are confirmed in writing on your quotation rather than estimated here. Ask for them explicitly when you enquire and you will get them in writing.
What does the Signet FSDD cost?
We quote per configuration and destination rather than publishing a list price, because voltage, tooling, spares package and shipping all change the figure. Send us your requirement through the form on this page and you will receive a written quotation.
Quotation
Get pricing for the Signet FSDD
Tell us your designs, stone sizes and target output. We reply within one working day with the right configuration and a written quotation.
Enquire about the Signet FSDD
Your enquiry reaches our team tagged to this exact model, so you will not be sent a generic brochure.