Bovis Units: What the Scale Really Measures

What this piece gives you: the documented origin of the number, the mechanism behind the swinging pendulum, and the American products that make the same move with different vocabulary. What it does not give you: a conversion factor. There isn't one.

What a Bovis unit is supposed to be

The Bovis unit, usually abbreviated BU, is a radiesthesia measure for the so-called life energy or vital quality of a place, a room, a food, a piece of jewelry or a person. It is not read off an instrument in the physical sense. It is read with a pendulum over a printed scale, called a biometer.

The standard reading runs like this: 6,500 BU is neutral. Below that is draining, above that is building. In the literature, churches, old cult sites and certain natural places are given values from 10,000 to 18,000 BU, individual pilgrimage sites considerably more. Newer variants of the scale produce numbers in the hundreds of thousands or millions.

A man from Nice — and even the first name is uncertain

The scale carries the name of a man who lived in Nice between 1871 and 1947. The surname is not in dispute: Bovis. The first name is. Depending on the source he is Alfred, André or Antoine. He is also widely described as a French physicist, and that description is not documented anywhere. In his own publications he called himself an inventor and a radiesthesist.

This is not pedantry. When a unit of measure is named after a person, the person is normally well documented — think Hertz, Ampère, Tesla. With Bovis not even the first name is settled. That says a great deal about the character of the scale: it grew inside a community of practice, not inside a laboratory.

There is also a story passed along in the field: that the Swiss geobiologist Blanche Merz traveled to Nice in the 1950s to ask Bovis's descendants about the origin of the biometer, and was told his papers had been burned. Whether that is true cannot be checked now. It is tradition, not a source base.

Why 6,500 — the number comes from a wine cellar

This is the most interesting part of the whole story, and it is almost never told.

Bovis's biometer was originally not an energy meter. It was an aid for judging wine — more precisely, wine color. And the scale was labeled in Ångström, the classic unit for wavelengths. One Ångström is a ten-billionth of a meter; visible light runs roughly from 4,000 to 7,000 Å.

Do the arithmetic: 6,500 Ångström is 650 nanometers — deep red. Wines that came out at 6,500 Å and above counted, in his procedure, as particularly wholesome.

So the famous “neutral” number 6,500 is nothing other than a wavelength of light in the red range that lost its unit somewhere along the way. Ångström became “Bovis units”; a color reading became a measure of vital force. Exactly when that reinterpretation happened is unclear; it took place around the French engineer André Simoneton, who from the 1930s applied the method to food and popularized it in his book on the radiation of foodstuffs.

You do not have to find this debunking. Traditions form this way. But anyone who says today “this place has 12,000 Bovis” is saying, by the scale's own history, “this place has 1,200 nanometers” — which would be invisible infrared. The number no longer carries a physical meaning.

How the scale reached geomancy

Its wide circulation in the German-speaking world is owed to Blanche Merz (1919–2002), a Swiss civil engineer who from 1979 ran an institute for geobiology in Chardonne. Merz traveled to cathedrals, temples and pilgrimage sites — Chartres, Santiago de Compostela, Egyptian sites, Tibetan monasteries — and published the values she dowsed there.

Her books remain formative. They got a whole generation to look at churches not as architecture but as energetic installations with measurable zones. The appeal is obvious: a number turns a feeling into a statement. It can be written down, compared, passed on.

The American version of the same move

Bovis units barely register in the United States. The scale is a European habit. But the move — attaching a number to an unmeasurable quality so it behaves like data — is everywhere in the American wellness market, wearing different vocabulary.

Claim you will actually meet in the U.S.	Same structure
“Scalar energy” pendants and plates	A named quantity with no definition, no reference standard and no instrument
Orgone devices	A unit of life force with an origin story and no measurement independent of the seller
EMF “harmonizers” and 5G stickers	Borrowed physics vocabulary; no before-and-after anyone else can reproduce
“Structured” or hexagonal water	A quality asserted as measured, measured only by the person selling it

The Federal Trade Commission requires that objective health and performance claims be substantiated before they are made, and it has brought actions over unsubstantiated claims for wellness devices. That is the practical American reason to care about the Bovis question: not because the scale is popular here, but because the same logic is, and it is attached to a price tag.

How the measuring is actually done

So you know what is being described, the usual sequence runs:

1. Lay out the scale. The biometer is a printed sheet with a semicircle or a line, values marked along it, usually 0 to 18,000.
2. Establish the reference. A sample goes at the zero point — a glass of water, a stone, a photograph of the place, often just a slip of paper with a name on it.
3. Formulate the question. “What Bovis value does this place have, for me, today?” The question has to be unambiguous or the answer will not be either.
4. Dowse. The pendulum is moved over the scale until it swings clearly at one point. That point is read off.
5. Counter-check. Careful practitioners measure repeatedly, on different days, and have someone else measure independently.

Step five is the interesting one, because it is where the thing regularly comes apart — and the people who take it seriously learn the most. How the craft works in general is in our guides to using a pendulum and dowsing rods.

What is actually happening when you dowse

That a pendulum moves is not in dispute. The only question is who moves it.

The answer has been known since the nineteenth century and is among the best-established findings in the psychology of perception: the ideomotor effect. William Benjamin Carpenter described it in 1852; Michel Eugène Chevreul demonstrated it shortly after, on the pendulum specifically. The core: an idea produces minimal, involuntary muscle movement. You think of a swing — your hand delivers one, without your noticing. The same mechanism explains the dowsing rod and the Ouija planchette.

Chevreul's decisive experiment was simple. He had people dowse while unable to see the scale. The swing disappeared. As soon as they could see where they were, it came back.

This is not disenchantment. It is precision. The pendulum does indicate something — just not the environment. It indicates your own expectation. It is an amplifier for what is already below awareness. That can be genuinely valuable. It is not a measuring instrument.

What the research gives you — and where the line runs

For Bovis units themselves there is no physical definition. No reference quantity, no standard, no instrument that outputs a value independently of a human being. Two people measuring the same place regularly arrive at different numbers — this is known within the field and usually explained by daily form or by a difference in how the question was phrased.

For the underlying procedure — dowsing with rod and pendulum — there is robust evidence, and it is unambiguous. Large controlled trials, including a German federal research ministry-funded report published in 1990 and a double-blind test conducted in Kassel in November 1990 with James Randi present, produced hit rates in the range of chance. The prize money offered in the Kassel test was not won. The pattern has held across the literature since.

The hardest-edged demonstration of what this costs is not a laboratory result at all. The ADE 651 and its relatives were handheld “bomb detectors” sold in large numbers to Iraq and elsewhere in the 2000s. They had no working parts. They were dowsing rods with a plastic housing, and they operated exactly as the ideomotor effect predicts — which is to say, not at all. Their British manufacturer, James McCormick, was convicted of fraud in 2013 and sentenced to ten years. They were in use at checkpoints while bombs went through.

The practical consequence is uncomfortable but clear: a Bovis value is not a property of the object measured. It is a snapshot of your own assessment, in numerical form. Anyone who uses it to advertise water, supplements or stones is selling a number with nothing behind it.

If you want work instead of a number

A dowsed value tells you nothing about what is actually going on in your home or your situation. The useful version of the same impulse is to name the thing directly. If a bedroom feels wrong, the checkable causes come first: light, noise, temperature, air, screens, where the bed sits relative to the door. Our guide to bed placement stays on that ground, and what the geopathic stress tests found covers the neighboring claim. If a room needs clearing, smoke and a room spray are the older instruments, and they do not pretend to be instruments at all.

What we do not promise

• That life energy can be measured in Bovis units. There is no physical definition and no human-independent method.
• That a high value makes a place, a water or a stone healthier or more effective.
• That a biometer can detect burdens, illnesses or hazards. Persistent symptoms belong with a clinician.
• That dowsing performs above chance. Controlled tests say it does not.

Frequently asked questions

What is a Bovis unit?

A radiesthesia measure for a claimed life energy of a place, food or object, read with a pendulum over a printed scale called a biometer. 6,500 counts as neutral, below as draining, above as building.

Where does the number 6,500 come from?

From a wine cellar. Bovis's biometer was originally an aid for judging wine color, and its scale was labeled in Ångström. 6,500 Å is 650 nanometers — red light. The number later lost its unit and became a measure of vital force.

Is there any physical basis for the scale?

No. There is no physical definition, no reference standard, and no instrument that produces a value independently of a person. Two people measuring the same place regularly get different numbers.

Then why does the pendulum move?

The ideomotor effect, described by William Benjamin Carpenter in 1852 and demonstrated on the pendulum by Michel Eugène Chevreul. An idea produces minimal involuntary muscle movement. Chevreul showed that the swing disappears when the dowser cannot see the scale.

Is dowsing itself tested?

Yes, repeatedly and under controlled conditions. A German federal research ministry-funded report in 1990 and a double-blind test in Kassel the same year both produced hit rates in the range of chance.

Is the pendulum useless, then?

Not useless — misdescribed. It amplifies what is already below your awareness, which can be genuinely useful for surfacing your own position on a question. It is not a measuring instrument, and nothing measured with it is a property of the thing measured.

Sources and further reading

• Radiesthesia literature on the origin of the biometer; physical conversion Ångström to nanometers.
• W. B. Carpenter (1852) on the ideomotor principle; M. E. Chevreul (1854) on the pendulum demonstration.
• Betz, König and Wagner, final report of the dowsing-rod study funded by the German Federal Ministry for Research and Technology, 1990; GWUP, Kassel dowsing test, November 1990, conducted double-blind with James Randi.
• Blanche Merz, published dowsed values for cathedrals, temples and pilgrimage sites; André Simoneton on the radiation of foodstuffs, from the 1930s.
• Reporting and court record on the ADE 651 device and the 2013 fraud conviction of its manufacturer.
• U.S. Federal Trade Commission substantiation requirements for objective health and performance claims.
• In the magazine: How to use a pendulum · Dowsing rods, how to · Geopathic stress: what the tests found · Emoto's water crystals, examined · Bed placement in the bedroom
• Questions about an order or a product: 28@templeofdesire.com

This piece places a measurement claim and its history. It makes no claim of efficacy. Persistent symptoms belong with a clinician.