ESMI XRF · FIELD ANALYSIS · INDONESIA

Know what is in your rock. And how sure we are.

ESMI XRF is a complete field solution: the analyser, two tablets, a microscope, a stand, sample boxes, a printer and the software, all from one party. It shows which metals are in a sample and how sure it is, and keeps every measurement so it can be checked again. No internet needed.

All in one
Honest results
Checkable later
Works offline
Safe by design

Request a demo or partner call See every step

App 0.3.1 Built for mining areas in Indonesia.

ESMI XRF on the field tablet, Select step, showing element tiles, a camera view for the sample photo and the scan type tiles.

Field tablet · choosing what to measure

ESMI XRF results after a real field measurement: iron about 277,177 ppm marked Screening ppm, and gold listed as Not quantified. A New measurement button is at the bottom.

Results screen after a real scan

An Indonesian woman in orange safety clothing and a helmet measures a rock face with the yellow ESMI XRF analyser.

1 · At the rock face

It starts where the work is.

A miner holds the scanner against the rock. No lab, no waiting, no internet.

A clear cup of black concentrate powder on a white bench.

2 · Through the window

The scanner shows what it measures.

A photo through the measuring window is saved, so you always know what was in front of the scanner.

Close-up microscope picture of ore: a rust-brown mineral spot in white and grey quartz.

3 · Up close

The microscope sees the grains.

Colour, grain and texture, close up, saved next to the measurement.

4 · The scan

Flashes become peaks.

The scanner counts the X-ray flashes and draws them live. Every metal has its own place on the graph.

ESMI XRF results after a real field measurement: iron about 277,177 ppm marked Screening ppm, and gold listed as Not quantified.

Estimate (screening ppm)Held back, never zeroSaved in full

5 · The result

A clear answer, and how sure it is.

Each number says what kind it is. Missing is never shown as zero.

Miners
Cooperatives
Government

6 · Who it helps

One record everyone can read.

Miners, cooperatives, buyers and government see the same evidence.

See who benefits

What makes ESMI XRF different

Six things you will not find in typical handheld XRF software.

Each one is something the app really does today, and you can see it in the screens further down.

Honest results
Every number says how sure it is: an estimate, lab-confirmed, or held back. A missing value is never shown as zero.
Nothing hidden, everything re-checkable
Every measurement is saved in full, so it can be checked again later. No black box.
Works without internet
Built for remote mines. Measurements upload by themselves when the signal returns, and you can sign in offline.
Two tablets, one safe instrument
The scanner tablet controls the X-ray source. A second tablet adds photos, microscope images and a bigger screen. A secure QR code links them. No extra apps.
Safety built in
The X-ray source only switches on after checks and a person's confirmation. It switches off by itself if the connection drops.
Photos and microscope as evidence
Pictures are attached to each measurement. Their limits are clear: a photo never says which metals are present.

Typical handheld XRF software versus ESMI XRF

A general comparison. No brand is named, and “typical” describes common approaches, not one product.

Typical handheld XRF software versus ESMI XRF
What you want	Typical software	ESMI XRF
Showing how sure a result is	Often one number, with little context	Every number is labelled: estimate, lab-confirmed or held back
A value that is missing	Can look like zero	Never shown as zero. Marked “held back”
Checking a result later	Calculations are often hidden	Full measurement saved, so it can be re-checked
Photos and notes	Often kept apart from the measurement	Attached to each measurement, with clear limits
Switching on the X-ray source	Rules differ by product	Checks plus a person's confirmation. Off when the link drops

A general comparison of common approaches. No product is named.

Who benefits

Clear information for everyone at the mine.

From the rock face to the regulator's desk, everyone sees the same evidence.

Miners and small-scale operators
- Know what is in the rock, on the spot
- Decide where to dig next, and avoid selling below value
- Works without internet, even deep in the hills
Cooperatives and mine owners
- One shared record for every sample
- Photos and results together in one place
- Easy to show to buyers
Government and regulators
- Every measurement is saved in full, with photo, time and place
- Nothing is hidden: any result can be re-checked from the saved measurement
- Supports fair, traceable reporting and oversight of responsible mining
Buyers, traders and investors
- Traceable evidence behind every number
- Clear which values are estimates and which are lab-confirmed
- Photos show the sample that was measured
Communities and the environment
- Supports ESMI's mercury-free, responsible mining approach
- Better information means less wasted digging
- Shared results build trust between miners, buyers and neighbours

How it works, in plain words

How a handheld scanner reads a stone

You do not need a laboratory to understand it. Here is what happens in a few seconds, one step at a time.

Meet the scanner This is the ESMI XRF analyser. Press its window against the sample and it does the rest.

A small beam of X-rays enters the stone
The scanner sends a small, controlled beam of X-rays into the stone. The beam only runs while the sample covers the window.
The X-rays knock a tiny particle loose
Every stone is made of atoms. The beam hits an atom and knocks a tiny particle, an electron, out of its inner ring.
The atom fixes itself and gives off a flash
Another electron drops in to fill the gap. As it falls, the atom gives off a tiny flash of energy.
Every metal flashes in its own way
Iron, copper and gold each give off flashes with a different energy. It works like a fingerprint: from the flashes, you can tell which metal it is.
The scanner counts the flashes and draws a graph
For a set time, the scanner counts the flashes and draws them as a graph called a spectrum. The higher a peak, the more of that metal.

Then ESMI checks every fingerprint, honestly

ESMI looks at each peak, checks that its matching partner peak is there too, and says how sure it is: found, estimate, lab-confirmed or held back. Nothing uncertain is shown as fact.

Safety, in plain words

The beam only runs while the sample is in place and a trained person has confirmed. It stops by itself if something goes wrong or the connection drops.

The ESMI field kit

Everything in one box.

The ESMI XRF analyser, both tablets, a microscope, a stand, sample boxes, a printer and the software: one complete solution from one party. Scroll to open the case.

The ESMI field kit: an open yellow transport case with the field tablet showing a real ESMI XRF result and spectrum, the USB microscope with a sample tray, sample boxes, the handheld XRF analyser, the holder and a printer.

Field tablet
Your workplace: choose what to measure, take photos and read the results.
Scanner tablet
Connected to the analyser. It is the only tablet that controls the X-ray source.
XRF analyser
The ESMI XRF analyser: the handheld scanner that finds out which metals are in a sample.
Adjustable XRF holder
Keeps the scanner steady and at a fixed distance from the sample.
USB digital microscope
Takes close-up pictures of the stone. They are saved with the measurement.
Sample boxes
Keep samples tidy, labelled and safe on the way.
Wireless printer
Prints the measurement report on site.

One party for everything

Hardware, software and data all come from ESMI, made to work together.

One partner, one contract
You deal with one party, not a stack of suppliers.
One support channel
One place that solves everything: hardware, software and data.
Made to work together
Every part fits the others, so there is no finger-pointing between suppliers.
A faster start
One setup and one training for the whole kit.
Updates in one place
Software updates and support come from the same team.

The tablet in the picture shows real ESMI XRF screens: the result and spectrum of the 13 Sep 2026 field measurement. Kit contents can vary. Talk to us about what fits your site.

Try it yourself

Run a scan. See how ESMI answers.

Pick an example sample and press Scan. ESMI measures at three positions, draws the signal, and labels every result.

Example

Example sampleIron-rich rockRusty, heavyCopper oreGreen-blue stainsGold-bearing quartzWhite, glassy

Press Scan to start.

Every step, as the operator sees it

Real screens. Real app. Version 0.3.1.

Swipe through the whole job, from choosing what to measure to reading the results. Every screen is a capture from the app, not a mock-up. Each step says what the software promises at that moment.

On the scanner tablet

The tablet that controls the analyser. It is the only one that can.

1 / 1

1 / 15
Start by choosing
Pick the elements and the sample first. Nothing is measured yet.
No X-rays at this stage. The source is not involved.
2 / 15
Focus on an element
Tap Au, Ti, Rh, Ag or Cu, or keep All. You can pick several together.
By default, every supported element is checked.
3 / 15
Search the full list
Search by symbol or name, browse everything, or jump to ESMI priorities and precious metals.
Choosing elements sets a focus. It does not hide the rest.
4 / 15
Set a target, if you want one
For an element, enter the amount you want to reach in ppm, or pick No target.
A target is optional. It is your goal, not a result.
5 / 15
Type the target
Here, 5 ppm for gold. Save keeps it with the plan.
Typing a target never produces a number for the sample.
6 / 15
The target stays in view
The list shows the target next to Au. Use all or Save selection to continue.
You can always see which targets are set.
7 / 15
Back on the first screen
Au Gold ≥5 sits under the row, with a count of targets set.
The plan shows what you asked for before you scan.
8 / 15
Photograph the sample
Take a photo. It is saved on the tablet, and the app says how well it matches a sample type.
A photo is saved with the record. It is never used to read chemistry.
9 / 15
Why this suggestion?
The app explains in plain words what the photo suggests and how sure it is.
A photo never proves that an element is present.
10 / 15
Choose the material
Soil, rock, metal, concentrate, refined metal or water. This sets the scan plan.
The plan follows the material you chose.
11 / 15
Continue with the scan plan
With elements, photo and material set, move on to the scan step.
Nothing starts until you move on.
12 / 15
Start is blocked, and says why
Detector temperature, camera photo and object checks are listed. Here, the object does not match the scan type.
Start stays blocked until every check passes, and the reason is on screen.
13 / 15
Confirm the safety tick
The operator ticks “XRF setup checked”: opening covered, steady, clear and not hot.
A trained operator confirms on site, and the confirmation must be given again each time.
14 / 15
The scan screen
Position 1 of 3 at 0°, a timer and an area for the live estimate.
The screen always shows which position is being measured, and for how long.
15 / 15
Signal view
The Spectrum tab draws the signal as it builds, with element buttons to switch markers on and off.
Switch peaks on and off to look at one element at a time.

After the scan: results and signal

Read the results, look at the signal behind them, and start again.

13 Sep 2026 These results come from a real field measurement on 13 September 2026.

1 / 1

1 / 9
Results for all positions
Iron: about 277,177 ppm, marked “Screening ppm”, with its range across the 3 positions. Gold is listed as “Not quantified”, with the reason.
Every number says what kind it is.
2 / 9
One position at a time
Tap Test 1 to see only the first position, at 0°.
Each position is kept separately, so you can see how much results vary.
3 / 9
Why these elements?
The app explains each result: how sure it is, how the number was worked out, and which X-ray lines were found. For iron, two lines match clearly.
The estimate is marked with its status, and the calibration source is named.
4 / 9
The signal behind the numbers
The Spectrum tab draws all three positions as coloured lines, with markers for iron and titanium.
The full measurement is saved behind every number.
5 / 9
Filter on one element
Pick an element to see only its marker, here iron.
You can compare each result with the signal it came from.
6 / 9
Full screen
More room, with buttons to move left and right, zoom in and out, and reset.
Zooming changes only the view, never the data.
7 / 9
Zoom in
Here, zoomed into the 18 to 23 keV part of the energy range to look closely at a narrow slice.
The saved data stays complete and unchanged.
8 / 9
Start a new measurement
When you are done, tap New measurement. The finished one stays saved.
The finished measurement stays saved on the tablet.
9 / 9
Results in Bahasa Indonesia
The results and the signal also follow the language switch.
Both languages show the same labels and the same checks.

Connecting and signing in

Pair the two tablets and sign in. Both steps work with or without internet.

1 / 1

1 / 3
Pair with the field tablet
The scanner tablet shows a one-time QR code for the field tablet to scan.
Pairing needs a QR scan on site. Being at the instrument is the proof you are there.
2 / 3
Sign in to My ESMI
Operators sign in with their My ESMI account, online the first time.
After an online sign-in, a personal PIN works offline for 14 days.
3 / 3
Bahasa Indonesia in one tap
Switch between EN and ID. The whole screen follows.
Both languages have the same steps and checks.

On the field tablet

Where the operator works: photos, microscope, scan plan. It can ask the scanner tablet to start or stop, and it never controls the instrument itself.

1 / 1

1 / 10
Choose, on a wide screen
Elements, sample photo and scan type sit side by side on the field tablet.
The field tablet can ask the scanner to start or stop. It never controls the hardware.
2 / 10
Choose the elements
Tiles for Au, Ti, Rh, Ag, Cu, or all supported elements by default.
By default, every supported element is checked.
3 / 10
Photo with guidance
The camera gives hints such as “Hold sample still”. A poor photo is marked “Retake needed”.
A photo marked “Retake needed” is not added to the scan.
4 / 10
Microscope photos
Take close-ups with the microscope app, then import them here, up to 12 per sample.
A photo cannot prove an element or give a ppm value.
5 / 10
Pick the scan type
Soil, rock, metal, concentrate, refined metal or water.
The plan follows the material you chose.
6 / 10
Ready check, waiting for the scanner camera
The plan shows 3 positions and the timing. Start waits for the scanner tablet's camera.
Start stays blocked until the scanner camera is connected.
7 / 10
Pair with the scanner tablet
Hold the field tablet upright and point its back camera at the QR code on the scanner tablet. Both on the same Wi-Fi.
No remote shortcut. Pairing happens in front of the instrument.
8 / 10
The scanner is open
The back camera reads the one-time QR code from the scanner tablet.
Both tablets prove who they are, and the link is encrypted.
9 / 10
Sign in
The same My ESMI account, on the field tablet.
After an online sign-in, a personal PIN works offline for 14 days.
10 / 10
Bahasa Indonesia
The field tablet follows the language switch, down to the ready check.
Both languages have the same steps and checks.

Two tablets, two jobs.

The same app runs on both. What each tablet does depends on the device.

Scanner tablet: the only one that controls the instrument

It is connected to the detector and the X-ray source. It runs the measurement, works out the results and saves the record.

Field tablet: where you work

Take photos, use the microscope, watch the scan and read the results. It can ask the scanner tablet to start or stop. It can never control the instrument itself.

Linked safely with a QR code

The tablets talk over a private, secure link. To pair them you scan a QR code in front of the instrument, so you have to be on site. There is no remote shortcut.

Photos and microscope

See what was measured.

Every measurement can come with pictures of the stone, so anyone can see later what was in front of the scanner.

Through the scanner's window

The scanner photographs the sample through its own measuring window. You always see what was measured, right on the tablet.

Photograph the sample. Take a photo. It is saved on the tablet, and the app says how well it matches a sample type. — What you see while taking the photo

What the scanner sees through its measuring window

Close-up with the microscope

The field tablet adds close-up pictures from a small USB microscope. Grain, colour and texture are easy to see.

Photo with guidance. The camera gives hints such as “Hold sample still”. A poor photo is marked “Retake needed”. — Taking a photo, with guidance on the field tablet

Microscope photos. Take close-ups with the microscope app, then import them here, up to 12 per sample. — Importing microscope pictures

Real microscope pictures of ore: a rust-brown mineral in white and grey quartz

The microscope pictures are real photos from the tablets, only brightened. The window views are illustrations.

Saved with the measurement

Photos are saved together with the measurement, so you can look at them again later.

A photo shows the stone, not the metals in it

Pictures help you read the sample. Which metals are present, and how much, comes from the X-ray signal only.

Results you can trust to be honest

Four kinds of result. Never mixed up.

A peak in the signal is a clue. A number in ppm is a claim. ESMI XRF keeps them apart and always tells you which one you are looking at.^[2],[5],[6]

Found (line evidence)
The signal clearly shows this element, with the right pair of peaks. It is probably there. This does not say how much.
Estimate (screening ppm)
A first estimate of how much, based on the built-in calibration. Good for ranking samples and deciding where to sample next. It is an estimate, not a lab result.
Lab-confirmed (validated ppm)
An amount confirmed by a certified laboratory. ESMI keeps the lab result next to the field result, so everyone sees both.
Held back (withheld)
The software chose not to give a number, for example because peaks overlap or no good calibration exists. Held back never means zero.

For specialists How detection and checking work, in more detail

Why more measuring time does not mean endless confidence

Detection uses a significance value (sigma) worked out from the counts around a peak. Longer measurements raise it, because counting error shrinks.
The background under a peak is never known perfectly, and that error does not shrink with time. ESMI adds a safety margin of 6 % of the background. This is an engineering value, not yet calibrated on blank samples. Sigma then levels off instead of growing forever.
The X-ray tube has a rhodium anode. Its own scattered signal could look like rhodium, palladium or silver, so ESMI never reports the anode and caps peaks in those regions at “possible”.
A second, independent peak must sit far enough from the main one. If it does not, the element can at best be “possible”.

Safety first

The X-ray source is the last thing to switch on.

ESMI XRF is built so that the software can never start X-rays on its own.^[1],[4]

Three checks, then a person

The source switches on only after the hardware safety lock, a temperature check and a fresh confirmation from a trained operator on site. The confirmation runs out and must be given again.

Off if the link drops

When the field tablet starts a scan, it sends a “still here” signal every second. If the link is lost, the scan stops within about 3 seconds. A weak link can stop a measurement. That is on purpose.

The last command is always OFF

We test crashes, read and write errors and cancelled scans with 53 automatic test methods. They check that the last command sent to the source is always OFF.

One controller only

The app refuses to start if another app could be controlling the detector. Older apps were disabled on the field tablets.

Offline first

Works in the mine. Uploads when the signal returns.

Measuring never waits for the network.^[3]

Scan
Saved on tablet
Protected queue
Internet works
Server receipt

Saved on the tablet first

Every record is stored on the tablet, protected, before anything is uploaded.

Uploads when the internet really works

Upload starts when Android confirms a working connection, such as a hotspot with mobile data. A hotspot with no internet counts as offline, so no time is wasted on retries.

The server receipt is the proof

A waiting upload is not proof. A record counts as safe only after the server confirms it and the receipt has been read back. Nothing is deleted before that.

Corrects the tablet clock

A tablet with no network time can drift. The app learns the difference from the server and stamps uploads with the right time.

Sign in offline with a PIN

After an online sign-in, each operator sets a personal 6-digit PIN. It works offline for 14 days, locks after wrong guesses and is wiped after 10. Offline records are marked “claimed” until the server can check them.

What's next

Where ESMI XRF is going.

A few things we are working on.

In development

Even better estimates

A more advanced way to estimate amounts, so screening results get closer to the real value.

With partners

More lab-confirmed results

Working with laboratories and reference-sample suppliers, so more results can carry the lab-confirmed label.

People in white ESMI hard hats and orange vests, and an inspector in batik, gather around an open yellow ESMI case on a field table at a mine site, looking at results on a tablet.

Built for the people who work the ground, and the people who oversee it.

How you get ESMI XRF Coming soon

Use the complete kit under a licence.

You do not buy or own 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.

Terms will be shared on request.

Ask about licensing

Included

The complete ESMI XRF kit
The software and its updates
Support from one channel

Partners

Let's measure together.

Laboratories, cooperatives, suppliers and authorities: we work with people who measure and oversee for a living.

Laboratories

Labs that test split samples and share the results, so more results can be lab-confirmed.

Reference-sample suppliers

Suppliers of certified reference samples for soils, rocks, ores and alloys, ideally close to Indonesian geology.^[7],[8],[9]

Mining cooperatives

Cooperatives and operators who want to test on real sites, with informed consent and local supervision.

Governments and agencies

Authorities who want transparent, traceable measurement in responsible mining.

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. ESMI keeps the lab result next to the field result, so everyone sees both.

Do I buy the kit?

No. 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, the software with its updates, and support from one channel are included. This is coming soon. Terms will be shared on request.

Does it replace the laboratory?

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

What does “held back” mean?

The software chose not to give a number, for example because peaks overlap or no good calibration exists. It never means the element is absent or zero.

Which instrument does it work with?

The ESMI XRF analyser, together with its scanner tablet. It is one complete kit. Other instruments are not supported today.

What happens without internet?

Everything needed for measuring works offline. Records are stored safely on the tablet and uploaded when a working connection returns. The server receipt is the proof of upload.

Is it safe?

The X-ray source switches on only after the safety lock, a temperature check and a fresh confirmation on site. A lost link stops a remote scan within about 3 seconds. The instrument manual and local rules always apply.

Can a photo show which metals are in a sample?

No. Photos and microscope images show shape, grain and likely minerals. Which elements, and how much, comes from the X-ray signal only.

How do I get started?

Get in touch and tell us about your site. We will show you the app and the kit, and talk through how it fits your work.

Sources and notes

Our own documents are in a private repository and available to partners on request. Public sources are linked at the end.

ESMI XRF development-team handover, 6 October 2026 (updated 9 October). Internal.
ESMI XRF re-check of the detection method on real signals, 9 October 2026: 98 measurements, 207 signals. Internal.
ESMI XRF design for offline work and offline sign-in, 4 October 2026. Internal.
Automatic safety tests (53 test methods) in the ESMI XRF code. Internal.
Technical source: NIST Standard Reference Database 128, X-ray transition energies. www.nist.gov/pml/x-ray-transition-energies-database
Technical source: xraylib, a library of X-ray fluorescence data. github.com/tschoonj/xraylib
Technical source: IAEA-457, certified reference material (marine sediment), IAEA. analytical-reference-materials.iaea.org/iaea-457
Technical source: GeoReM, database of geological and environmental reference materials. www.georem.earth/
Technical source: USGS geochemical reference materials. www.usgs.gov/centers/gggsc/science/science-topics/geochemical-reference-materials

Know what is in your rock. And how sure we are.

It starts where the work is.

The scanner shows what it measures.

The microscope sees the grains.

Flashes become peaks.

A clear answer, and how sure it is.

One record everyone can read.

Honest results

Nothing hidden, everything re-checkable

Works without internet

Two tablets, one safe instrument

Safety built in

Photos and microscope as evidence

Typical handheld XRF software versus ESMI XRF

Miners and small-scale operators

Cooperatives and mine owners

Government and regulators

Buyers, traders and investors

Communities and the environment

A small beam of X-rays enters the stone

The X-rays knock a tiny particle loose

The atom fixes itself and gives off a flash

Every metal flashes in its own way

The scanner counts the flashes and draws a graph

Then ESMI checks every fingerprint, honestly

Safety, in plain words

Field tablet

Scanner tablet

XRF analyser

Adjustable XRF holder

USB digital microscope

Sample boxes

Wireless printer

One party for everything

One partner, one contract

One support channel

Made to work together

A faster start

Updates in one place

On the scanner tablet

Start by choosing

Focus on an element

Search the full list

Set a target, if you want one

Type the target

The target stays in view

Back on the first screen

Photograph the sample

Why this suggestion?

Choose the material

Continue with the scan plan

Start is blocked, and says why

Confirm the safety tick

The scan screen

Signal view

After the scan: results and signal

Results for all positions

One position at a time

Why these elements?

The signal behind the numbers

Filter on one element

Full screen

Zoom in

Start a new measurement

Results in Bahasa Indonesia

Connecting and signing in

Pair with the field tablet

Sign in to My ESMI

Bahasa Indonesia in one tap

On the field tablet

Choose, on a wide screen

Choose the elements

Photo with guidance

Microscope photos

Pick the scan type

Ready check, waiting for the scanner camera

Pair with the scanner tablet

The scanner is open

Sign in

Bahasa Indonesia