ESMI XRF
ENID

ESMI XRF · Field analysis · Indonesia

7:12 in the morning, at a small mine in Sulawesi.

A cup of black sand. Is it worth selling?

Until now, the answer meant sending a sample away and waiting. With ESMI XRF the operator taps a photo of the sample, starts a safe scan and, within minutes, reads one clear answer on the screen and on a printed receipt. Poisonous elements are flagged, and every scan is saved as proof.

See how it works Request a demo
  • Two taps to start
  • Works offline
  • English · Bahasa Indonesia
  • Prints a receipt on site
Printed ESMI XRF receipt for a concentrate sample, with iron, copper, zinc, lead and arsenic values and warning marks on lead, arsenic and mercury

App design preview · illustrative values

Built for everyone at the table

One scan. Six people who care about it.

Pick who you are, and we will show you the part that matters most to you.

Operators and minersIllustration

Tap a photo, press Start, read one big answer. A beep and a buzz when it is done, and a printed slip to keep.

Watch the seven steps

How it works

From a cup of sand to a printed answer, in seven steps.

No training in X-ray physics needed. Scroll through one scan, the way an operator does it.

  1. Step 1 No codes, no menus

    Pick the photo that looks like your sample

    Nine photos: sand, soil, rock, three kinds of concentrate, gold, silver and water. Tap the one that matches. A one-line tip says how to prepare it.

  2. Step 2 Cup or flat side down

    Put the sample on the window

    Fill a small cup, or lay the flattest side of the metal on the analyser window. The live camera checks that the window is covered and that the sample keeps still.

  3. Step 3 Paired once

    Tablet and analyser talk to each other

    The handheld analyser and the big-screen Field Hub tablet were paired once, with a QR code or a one-time code. The Link light is green, and both screens follow the same scan.

  4. Step 4 You stay in control

    Scan, with a safety guard

    You confirm: sample fixed, area clear. Only then do X-rays switch on. A watchdog times every second, and Stop is always on screen. If the link drops, the X-rays switch off by themselves.

  5. Step 5 Spectrum first

    The signal becomes a result

    Every metal sends back its own fingerprint of energy. ESMI reads that pattern, recognises what kind of sample it is, and turns the peaks into amounts. The ± gets smaller while it measures.

  6. Step 6 Easy to read

    One big answer

    The headline card shows what matters: the karat of a ring, or the gold, copper or other valuable metal in an ore. Poisonous and buyer-penalty elements get a ⚠ flag. A sound and a buzz tell you it is done.

  7. Step 7 Paper and cloud

    Print it. Sync it.

    Print a 58 mm receipt on the spot for the buyer, the bag or the logbook. The scan, its photo and its place are saved, encrypted, and sent to My ESMI when there is signal, today or next week.

Every feature, in depth

Simple on the surface. Serious underneath.

Each feature starts with what you gain. The detail is underneath, for those who want it.

Spectrum-first analysis

It trusts the sample, not a menu setting.

Most handheld software makes you choose a database first, and the answer depends on that choice. ESMI reads the X-ray spectrum itself, recognises what kind of sample it is, and calculates with the right physics. Your photo choice is only a hint.

  • Recognises the sample type from the spectrum: precious metal, base metal, light ore, heavy ore or rare earths. When it is not sure, it says so instead of guessing.
  • Calculates with a physics model (fundamental parameters) that uses the exact conditions of each measurement: voltage, current and filter.
  • Anchored to ESMI's own reference samples, a pure silver coin and a 16-karat gold ring, not to factory curves.
  • When your choice and the spectrum disagree, you see both and decide: “Calculate as gold” or “Keep soil”.
Read more
Field finding: one gold ring, almost the same spectrumOn 23 Oct 2026 one 16-karat ring was measured in the analyser's original app under three different database settings. The spectra were almost the same. The answers were not.
  1. Original app · database setting AAu 66.7–67.7 %
  2. Original app · database setting BAu 0.26 %
  3. Original app · database setting Cno gold reported
  4. ESMI, from the spectraAu 66.0–68.5 % · ≈ 16 k

Settings anonymised. ESMI's range covers three measurement conditions.

When the photo choice and the spectrum disagree, the operator decides.

Nine photo tiles

Nine photos instead of a list of modes.

Operators pick what they see. Nine photos cover what is found at Indonesian mine sites, so nobody has to read technical mode names.

  • Two taps: your last choice is remembered, so most scans are “tap photo, tap Start”.
  • Black, white and sulfide concentrate each have their own tile, so a white concentrate is never mistaken for soil.
  • Every tile shows one line on how to prepare the sample.
  • The photo is a hint. The spectrum has the final word.

Tile pictures are illustrations, the same ones the app uses.

  • Sand / gravelSand / gravelDry · finely ground · cup ≥ 6 mm
  • SoilSoilDry · finely ground · cup ≥ 6 mm
  • RockRockFlat, clean face on the window
  • Concentrate – blackConcentrate – blackDry · finely ground · cup ≥ 6 mm
  • Concentrate – white / lightConcentrate – white / lightDry · finely ground · cup ≥ 6 mm
  • Sulfide concentrateSulfide concentrateDry · finely ground · cup ≥ 6 mm
  • Gold / jewelleryGold / jewelleryFlattest part on the window
  • Silver / metalSilver / metalFlattest part on the window
  • Water / filterWater / filterDry filter only

Headline result card

One big answer, and the warnings that cost money.

The headline card shows the number that matters for this sample, so nobody has to search a long table.

  • Gold and jewelleryThe karat and fineness in one line, for example ≈ 16 k (667).
  • Ores and concentratesThe element you were looking for, or else the most valuable one found.
  • The right unitMetals in %, ores in ppm, always with ±. “Not detected” shows the real limit, never 0.
  • ⚠ Toxic and penalty elementsArsenic (As), mercury (Hg), lead (Pb), cadmium (Cd), antimony (Sb) and thallium (Tl) are flagged. They harm people and lower the price buyers pay.
  • Lab result +Type in the lab's value next to the scan. The row turns “Lab-confirmed” and shows the difference.

Neutral = estimate · green = lab-confirmed · amber = asked for, but held back

Read more: Gold Read more: Toxic elements

Field checks

Checked in the field against known samples.

Two of ESMI's own reference objects, measured again and again under different conditions.

These are field checks by ESMI on its own reference objects. They are not a certification or an assay. For official or trade figures, use a certified laboratory.

16-karat gold ringKnown: about 66.7 % gold

≈ 16 k every time

Pure silver coinKnown: 99.9 % silver

ESMI, all 8 spectra · 99.9 % Ag

8 of 8 spectra, under every setting

Two-device workflow

Two screens, one job each.

The rugged handheld analyser does the measuring. The big-screen Field Hub tablet does the looking: photos, microscope and review.

Handheld analyserRugged, in the hand or in its stand. It alone controls the X-ray tube.
Field Hub tabletBig screen for the overview photo, microscope close-ups, the live spectrum and the results.
  • Paired once with a secure QR code or a one-time code. After that they find each other.
  • Both screens follow the same scan, live.
  • Photos are judged on the tablet's good camera, while the analyser concentrates on measuring.

Works offline

No signal? Keep working.

Remote mines often have no internet. ESMI XRF does everything on site and catches up later.

  • “Work offline” switchNo waiting on a weak or fake connection.
  • Encrypted, signed outboxEvery scan is encrypted and signed by the device, so it cannot be changed unnoticed on the way.
  • Syncs by itselfSent to My ESMI (my.esmi.earth) when the signal returns.
  • Offline sign-inA personal PIN works without internet, for up to 14 days.
Read more

Simple and bilingual

Made for the person holding it.

English and Bahasa Indonesia, big buttons, and colours that say more than words.

  • EN / IDSwitch language with one tap: every screen, message and receipt.
  • Traffic-light tilesScanner, Link, Uploads and Printer: green, amber or red at a glance.
  • Sound and vibrationA cue when the scan ends, so you can look away.
  • Plain messages“Scan stopped automatically. X-rays are off.” Never an error code.

Original-app comparison

Using the analyser's original app too? See both answers side by side.

Optional and read-only. ESMI can read a scan made in the analyser's original app, recalculate it from the same spectrum and show both results together, with a reason when they differ.

  • Read-only: ESMI never changes or controls the other app.
  • Same spectrum, two answers, one screen.
  • Differences get a reason, for example a database setting that does not fit the sample.
  • Can be switched off in the profile.

My ESMI organisation account

Every scan belongs to your organisation.

My ESMI (my.esmi.earth) is the online home for your devices, your people and your scans.

  • Organisation-owned devicesAnalysers and tablets belong to the organisation, not to one person.
  • InvitesInvite operators. Each signs in with their own account.
  • Traceable scansWho, when, where and on which device, with photo evidence attached.
  • Trusted originRecords arrive signed by the device that made them.

Bluetooth receipt printing

A printed receipt, right where the deal is made.

Pair a small 58 mm Bluetooth receipt printer and print the result on the spot: for the buyer, for the bag, for the logbook.

  • Prints from the Field Hub tablet.
  • In English or Bahasa Indonesia.
  • Lab-confirmed lines once you have entered lab results.
  • Honest status: “Sent to printer” and “Printed” are different messages. “Printed” appears only when the printer confirms.
Read more
A printed 58 mm ESMI XRF receipt with a slight curl: header with the ESMI logo, sample details, a spectrum, element values with ±, warning marks on lead, arsenic and mercury, and a box saying Quick scan, screening, not validated.
  1. 1ESMI logo and report titleRecognisable on every slip.
  2. 2Sample, date and planWhich sample, when, and how long it was measured.
  3. 3The spectrumThe fingerprint the numbers came from.
  4. 4Results with ±And the real limit when something is not detected.
  5. 5⚠ Toxic flagsLead, arsenic and mercury marked, with a handling note.
  6. 6Honest statusScreening, estimate or lab-confirmed, in a box nobody can miss.
Sample receipt printed from the app's test data. GPS and operator are hidden on this website; a real receipt prints them.

Why ESMI

What changes compared with typical analyser software.

A fair comparison with what handheld XRF software commonly offers. Individual products differ.

TopicTypical analyser softwareESMI XRF
Choosing the analysisYou pick a database or curve first. The answer depends on that choice.Reads the spectrum, recognises the sample type and calculates with the matching physics. Your choice is a hint.
CalibrationFactory curves for each database.A physics model per measurement condition, anchored to ESMI's own reference samples.
How sure is the number?A number is shown; judging it is left to an expert.Every value has ± and a status: estimate, held back with a reason, or lab-confirmed. Never a silent 0.
Who can use itTechnical mode names, written for trained users.Nine photos, English and Bahasa Indonesia, traffic-light status, sound and vibration.
Toxic elementsListed in the table like any other element.⚠ flagged on screen and on the receipt.
Lab resultsKept somewhere else, often in a spreadsheet.Lab result + next to the scan; the row becomes Lab-confirmed.
Safety in softwareRelies on the instrument and the operator.Adds a watchdog, link-loss shut-off, a confirmation before every scan and no remote start.
Offline and recordsResults stay on the device; export by cable or file.Encrypted, device-signed outbox that syncs to My ESMI by itself.
EvidenceNumbers only.Overview photo, microscope close-ups and place saved with the scan.
On-site paperworkReports are usually made later, on a computer.58 mm receipt printed on site from the tablet.

Based on ESMI's field experience with typical handheld XRF software. No specific product is named or rated.

Safety and trust

Safe by design. Honest by default.

X-rays deserve respect. ESMI adds software safety on top of the analyser's own safety features, and makes every number say how sure it is.

Five safety layers

  1. Link lost? X-rays off.

    If the link between tablet and analyser drops during a scan, the X-ray source switches off by itself.

  2. A watchdog on every scan

    An independent timer watches each scan. If anything takes longer than planned, it stops the scan and switches X-rays off.

  3. A person confirms every scan

    Before each scan the operator confirms: sample fixed, area clear. X-rays never start on their own.

  4. No remote start

    The X-ray source can never be started remotely: not from the internet, not from My ESMI.

  5. Stop is always there

    A big Stop button stays on screen during every scan.

Trust in the data

  • Encrypted and signedRecords are encrypted on the device and signed by it, so changes are detectable.
  • Status on every valueEstimate, held back or lab-confirmed. A missing value is never shown as zero.
  • Evidence attachedPhotos, time and place travel with the scan.
  • Toxic elements visible⚠ on screen and on paper for As, Hg, Pb, Cd, Sb and Tl.
Read more
The ESMI field kit: an open yellow transport case with the field tablet, the USB microscope with a sample tray, sample boxes, the handheld XRF analyser, the holder and a printer.Illustration

The ESMI field kit

Everything in one case.

The analyser, both tablets, a microscope, a stand, sample boxes, a printer and the software: one complete solution from one party.

  • Field Hub tabletChoose, photograph and review on a big screen.
  • Handheld analyserIt alone controls the X-ray tube.
  • Adjustable holderKeeps the analyser steady at a fixed distance.
  • USB microscopeClose-ups saved with the scan.
  • Sample cups and boxesTidy, labelled and safe on the way.
  • 58 mm receipt printerPrints the result on site.

Kit contents can vary. Talk to us about what fits your site.

Use it under a licence. Coming soon

You do not buy the kit. You use the complete ESMI XRF kit and software under a licence, for a yearly fee combined with a percentage of the revenue from the minerals. The kit, software updates and support from one channel are included. Terms on request.

Ask about licensingRead more

FAQ

Questions we expect

Can I use the results for official or trade figures?

ESMI XRF gives you fast results on site. For official or trade figures, send a sample to a certified lab, then enter that lab value with “Lab result +” so everyone sees both.

Does it replace the laboratory?

No. It gives you a fast first look on site, helps you decide what to send to the lab, and keeps a record anyone can check. The lab stays the reference for official numbers.

Can it tell the karat of gold?

Yes, as an estimate. For gold and jewellery the headline card shows the gold percentage with ± and the nearest fineness, for example ≈ 16 k (667). Small or curved objects give less signal, so the ± is wider; measure the flattest part.

What about mercury and arsenic?

Arsenic, mercury, lead, cadmium, antimony and thallium are flagged with ⚠ on the screen and on the receipt when they are found. When they are not found, the app shows the real detection limit, never zero.

Do I need internet?

No. Measuring, results, printing and sign-in with your PIN work offline. Scans wait in an encrypted outbox and sync to My ESMI when the signal returns.

Which languages does it support?

English and Bahasa Indonesia, on every screen, message and receipt. You switch with one tap.

What printer do I need?

A small 58 mm Bluetooth receipt printer, paired with the Field Hub tablet. The app only offers real printers and tells you honestly whether the slip was sent or actually printed.

Is it safe?

The X-ray source starts only after a fresh on-site confirmation, a watchdog times every scan, the source switches off when the link drops, and it can never be started remotely. The analyser's manual and local rules always apply.

Can we keep using the analyser's original app?

Yes. ESMI can optionally read those scans, read-only, and show its own result from the same spectrum next to them.

Do I buy the kit?

No. You use the complete kit and software under a licence. This is coming soon; terms are shared on request.

Are the app screens on this site real?

They are design previews of app version 0.3.21, drawn from the approved designs, with illustrative values. Real device screenshots will replace them.

Read more

Contact

See it with your own sample.

Tell us about your site and your samples. We will show you the app, the kit and the receipt, and talk about how it fits your work.

Request a demoEmail us: xrf@esmi.earth
  • Operators and owners: book a demo at your site
  • Buyers: bring a sample you know
  • Investors and partners: request a partner call
  • Government: request a safety briefing
  • Labs: ask for the method notes