The Batlogger M2 From Elekon - Updated 10/13/2022

The Batlogger M2 From Elekon

The BatLogger M2 comes to us from Elekon AG, in Switzerland. It is a high-end, professional bat detector; and possesses many advanced features.

It is very versatile, and is very well adapted not only to active bat recording (during bat walks, transects, etc.) but also for nightly passive recording. I find this both an excellent and very welcomed feature. Whenever testing and using bat detectors over the years, I always use them in this fashion (overnight/unattended recording). So, I was very happy to discover this ability.

When the unit arrives, the outer packaging / outer box is as one would expect (usually, with packing tape sporting the logo "Elekon" on it). However: Once you get to the inner box - the one holding the Batlogger M2, and it's included cables, etc., then the uninitiated may begin to feel like Indiana Jones in The Temple of Doom...Searching for the hidden "switch" or pressure point which will magically allow the box to open - Granting the new owner access to this high-tech scepter.

More than one user of the new BatLogger M2 has experienced a bit of frustration, while trying to figure out exactly how this box opens...

Well, in hindsight...after experiencing what this bat detector can do, I feel that a box which has the potential to be a bit of a puzzle is quite fitting!

Here, we can think along the lines of The Sword in The Stone, and similar stories...

The formidable capability of this powerful new BatLogger cannot just be handed over to anyone. You must first pass a test, to prove you're worthy!

"With great power, comes great responsibility" - Uncle Ben, from Spider-Man.

The BatLogger M2 measures 220 x 70 x 46mm, and weighs only 222 grams. This is excellent, and it feels relatively light, and very comfortable in the hand. This is also partly due to the detector's ergonomic design. Very nice.

The M2 measures 220 x 70 x 46mm, and weighs only 222 grams. 

It feels lighter than it’s predecessor (The M) and is quite comfortable in the hand. This is due to the detector's ergonomic design.

Holding The M2 for long periods of time should present no issues, or cause fatigue for the majority of users: It features a unique shape, with an ergonomically designed handle. 

The M2 is robustly built, and even features a built-in attachment point for a (user-supplied) lanyard.

The BatLogger M2 - Using Halloween Theme

When considering the (unique) design of The BatLogger M2; I'd like to take this opportunity to point-out that: It's predecessor, The BatLogger M was also fairly comfortable to hold (due to it's hourglass shaped design). However, it is a heavy, solid unit.

Holding The M2 for long periods of time should present no issues, or cause fatigue for the majority of users: It features a unique shape, with an ergonomically designed handle.  

The M2 is robustly built, and even features a built-in attachment point for a (user-supplied) lanyard. 

As for features, there are numerous...

I found The BatLogger M2 very easy to use.

• The M2 uses a built-in, rechargeable, Li ion battery.

• It is currently priced at right around $1,200 USD, directly from Elekon’s Online Shop.

• It is also in stock at many Dealers throughout Europe (NHBS [in The British Isles], etc.)

• The M2 uses a MicroSD card as it’s storage medium - Be sure to get a fast/good quality SD card for best results.

• Front / User-facing Mic for recording comments

• USB-C connector (under rubber SD card cover)

• 3.5mm headphone jack

• Standard ¼” socket for tripod mounting

 

• USB charging cables are provided

• Live Recording Level Indicator

• Recording Modes: Auto / Manual / Paused / Interval Mode

• Live, adaptive Spectrogram Screen Display

• Auto ID! 32 European bat species

• Recent Recordings - displays Metadata for 20 recordings

• Transect Mode - Way-points dynamically displayed in different colours

• Sensors! Temp in ℃ / % r. H. / Lux / GNSS 

• Also height above sea level and velocity

• In/Out Counting feature for bat roost surveys

• Torch Mode

(My Apologies - Image was temporarily lost...

working on it)

An interesting consideration, is that The M2 is well-suited to meet the needs of many bat working professionals. In no small part, due to it's versatility...

Which translates into this BatLogger M2 being very good for:

• Bat Workers
• Ecologists
• Biologists
• Researchers

(My Apologies - Image was temporarily lost...

working on it)

BatLogger M2 - 'Almond' Coloured Theme - Sensor status displayed

The BatLogger M2 also possesses many additional features:

• Ability to add voice comments during a recording session.

• Ability to add a tag to a specific recording.

• Ability to view and/or playback recordings directly from the device.

Ability to change the way it sorts through recordings: Name ascending, Name descending - Date ascending, Date descending.

After an adequate amount of testing, it was easy to confirm the accuracy of not only the recordings, but the M2's valiant attempts to auto ID the species detected.

Now, of course, I reside in The U.S. and the unit currently only Auto ID's European bats. 

(My Apologies - Image was temporarily lost...

working on it)

BatLogger M2 - On windowsill - Passive recording (Green theme)

The BatLogger M2 can display the metadata of each recording such as: 

• The Trigger frequency.

• Temperature.

• Profile used (Explore, Passive, etc.).

• A graph with the spectrogram (spectrum data is averaged).

(Sorry - Image was temporarily lost...

working on it)

The M2 - Displaying detailed GPS satellite Info

Some of the other data, accessible directly from The M2 includes:

• The Log (Batrec.log file) - Displaying hardware/Mic events.

• Ability to create custom Recording Profiles (this may also be done via the desktop app).

• Ability to check/change sample rate (312.5kHz, 384kHz or 500kHz)

Pros:

• A feature-rich, Pro-level bat recorder, which will meet the needs of the most demanding Biologists.

• Ability to create several customization's - Via device, and/or via the free desktop app (BatExplorer).

• It is as sensitive, accurate, and as pleasurable to use as you might expect from a top-of-the-range bat detector.

• It’s simple enough to use straight out of the box - Yet has enough advanced features to keep a user busy for many days - Just learning how to use them all!

• The GPS/GNSS is extremely accurate, and the resulting .gpx files may be viewed with a myriad of Apps.

• With a user-replaceable microphone module, this detector has the potential to last many years.

Cons:

• It froze on me once. I had to plug it into my laptop’s USB port, in order to power it down.

• I occasionally find the BatExplorer software to be a little slow.

So, I'd like to share some information recently acquired (Oct. 2022) via e-mail correspondence with an acquaintance of mine, who is a Professional Bat Researcher. His name is Jon Whitehurst, IoW Bat Group Operations Officer - IoWbats.org

He is also a long-time user of The Batlogger M, in September, he wrote to ask what my thoughts were regarding the new Batlogger M2. 

I advised him that The M2's microphone, recording range, and rejection of non-bat sounds was superior to The M. Also, that The M2 has so many features, as to almost make The M seem quite plain (in comparison). And a couple of other things I like about it.

Having recently acquired the new M2, he's had opportunities to use both the M/M2 side-by-side in his work on The Isle of Wight.

I was granted permission to quote him, with the caveat that these are casual observations from some of the first outings, rather than scientific comparisons.

With that stated, I shall simply quote him directly:

"Hey Al, just got my first two surveys in with M2 and classic back to back. Performance wise, the M2 had better trigger reliability than the classic (M2 set to high and classic on crest triggering).

M2 is more sensitive and looks better signal to noise, and first glance better linear dynamic range.

M2 GPS not as accurate but OK... In transect mode, it was great to have track and position in front of me as the woodland track I was walking has a number of false paths and potential for getting lost.

However, I think there is a wrong sign in the code that sets the direction of the position arrow - one for me to feed back to Elekon. Also great to have Lux and RH data as well as temperature recorded.

It is a definite game changer - not had time to really delve into optimising the settings yet though..."

-And- 

"Definitely getting much better triggering though - recording bats (common pips) where the classic is missing them, but I need to swap the mic over on the classic, just in case it is the mic that is degrading..." 

I understand what is meant by his last statement. As with enough use and passage of time, The Batlogger M's microphone can begin to lose sensitivity. In some cases this happens gradually (almost imperceptible) and in some, quite rapidly.

Jon was also kind enough to share the following screenshots with me. The first one represents The Batlogger M. The second one, The Batlogger M2:

Red is Pip and Cyan is Bbar

M2

"The missed ones by the classic look to be weak calls on the M2 recordings, so might just be down to sensitivity/signal to noise rather than the trigger algorithm itself.

The GPS track shows you how long the M2 took to stabilise at the start compared to the classic... One to watch really as "GPS lock" does not necessarily OK to operate accurately.

By the way, the transect is a continuous walk at 2km/S, no stopping, both the recorders set to record 500mS pre and 2500 post trigger."

It's been quite some time since a bat detector has impressed me this much. The only other (Pro-level) bat detector which was this impressive, was The AnaBat WalkAbout from Titley. The WalkAbout was a bat recorder which ticked all the boxes.

Next up, will be a full review of The BatLogger S2 - Passive/Static bat recorder also from Elekon.

Until then...

Happy bat detecting!

New Bat Detectors: Available Now! -And- Coming Soon!

"We interrupt our regularly scheduled bat detector reviews, to bring you news of the following new developments"

There are some new bat detecting devices available now – several manufacturers have produced and released new detectors for sale. 

I will be testing and reviewing the following two brand-new systems soon:

In order of their release:

• The pairing of Dodtronic's Ultramic (200K) -And- Ultrasonic Analyzer (for iPad and iPhone); produces a full-featured bat recording solution. I'll be performing my testing and review, on a borrowed iPhone.

• The micro trio, from Ciel EaM - This bat detector is currently very new, and only available to the public via Advance Orders (for now).

Each of the preceding bat recording solutions look very promising!

The solution from Dodotronic & Ultrasonic Analyzer is available now. 

The brand-new bat detectors from Ciel Eam (there are several) are available as pre-order items right now. Others are set to be released soon...

I will also be writing a short review of the latest version of SoundChaser software (works with Dodotronic's Ultramic series of microphones). From Acounect in France. They are also currently offering a free 15-day trial of their software Here. So, if you own an Ultramic, you should have a look and try it out.

Now, on to a few more new bat detectors!

Please Note: At this time, there is no indication that I will have the opportunity to review any of the following new devices. I list them here, for the sake of being complete, and thorough. As always, one of the main purposes of this blog, is to inform the public of new bat detectors as they become available.

Be that as it may, I do plan to purchase and use a Momimic from Dodotronic. So a review of this super-small microphone will eventually be posted here. I am planning to build a homemade, ultrasonic, parabolic dish to record singing insects with. And I plan to use The Momimic as the microphone for it.

Elekon AG - The latest model of their wonderful Batlogger M, has had a few minor changes. The small, external GPS antenna now resides inside the case (no longer visible). In addition, the GPS system itself, now utilizes data from The GLONASS satellites. This is especially helpful, to those in Europe and Russia, etc. Read more at the Newsletter Archive Page.

Avisoft Bioacoustics has recently announced updates to their USG116Hm/116Hmn

Titely Scientific, is poised to release their brand-new AnaBat Express very soon...And, from what I've seen so far - It looks very interesting.

BatBox is supposed to be coming out with a new bat detecting device! No one knows much about it (yet!)

Once again, I will not be reviewing any of these devices, so please contact the manufacturers with your questions.

The "busy season" for new bat detecting devices is here; and once again, I have two (software) reviews in progress...

"We now return to our regularly scheduled bat detector reviews...Part 2 of The Echo Meter Touch review coming up next"

Happy bat detecting!

First Impressions: The 'FG Black' Microphone - For Elekon's Batlogger M

First Impressions: The 'FG Black' microphone - For Elekon's Batlogger M

If you've been keeping abreast of top-of-the-range bat recorders recently, then you're probably familiar with The Batlogger M (from Elekon AG in Switzerland).
By now, I'm sure that many of you are well aware of what an incredible bat detector it is. It's capabilities have been proven to exceed those of instruments in it's price range, and several costing much more.

Just to reiterate my thoughts on The Batlogger M: I've found it to be the best performing bat detector I've reviewed thus far.

Several distinguished Bat Workers feel just as enthusiastic as I do about the Batlogger (if not more-so!).
I'd never really given much thought to the possibility of this unit performing even better...
Then Elekon made some optional Microphones available, amoung them is one called 'FG Black' - The fact is, they have made more than one optional microphone available. And they have been available for as long as the Batloggers have...but this Post will focus on The FG Black model.

In the photo above, from Left to Right: The FG Black, The FG Green, The BL (Stock) Mic

There's this wonderful comparison chart, of optional microphones that I've been admiring recently: Elekon's Microphones

What follows, are my initial impressions and findings. I believe that I'll be able to gather enough detailed information about this mic to write a more lengthy Review. If not, I will simply update, and add to this Post. 

Just Imagine, being able to take the "stock" Batlogger, and increase it's capabilities even further.
As you may have noticed from the microphone chart on Elekon's Site: The FG Black features an integrated preamplifier (Wiki Link explaining what a preamplifier is).
Which helps to explain why this microphone upgrade has such an amazing impact on the detector's overall performance. 

I'm monitoring it's sensitivity even now, as I type; and it's simply wonderful.
It wasn't like this on the first night I tried it out! It was rather chaotic - I simply wasn't prepared for the dramatic difference compared to the stock mic (A MEMs unit, called the BL).

With the FG Black attached (using my good quality shielded audio cable) all manner of singing Insects were being detected (and recorded!)
At first, I really wasn't sure why this was happening. The first possibility that I thought of, was that certain singing insects may have just recently become active. I considered the possibility, that a certain combination of environmental conditions was responsible (for the sudden increase in insect songs).

In any case, the first thing that I did, was to go into the Batlogger's settings, and decrease the sensitivity of the trigger. I increased the threshold from a setting of 6 to 7. Yet, some singing insects were still being recorded. I didn't mind the fact that they were heard - But, at this particular point in time, I did not intend on recording them. I eventually increased the trigger to 9, in order to stop them from being recorded. 
It was obvious that this new, amplified microphone was so much more sensitive than the stock microphone. So much so, that it was easily pulling in several species of insects (residing in the surrounding trees & vegetation). Singing insects which were not detected at all, using the stock microphone.
Switching between the microphones several times confirmed this.

Thanks to the comparison chart, provided by the researcher who preferred to remain anonymous: We know that the Batlogger and Batlogger M are able to detect and record bats, at distances of well over 60 Meters... The addition of the FG Black microphone presents some fantastic possibilities, to say the least.

At this time, I have only scratched the surface of what is possible with this new microphone. I've tested it on several nights now, of course the sensitivity is terrific! And of course there's an increase in the number of bats recorded per night. But, there are more tests to be done – and more findings to report. Especially in regards to it's usefulness to those who study (and record) Orthoptera.

To be continued...

 Happy bat detecting!

A Fascinating Document From An Anonymous Amateur Researcher

I just received this fascinating document today, and wanted to share it right away - Below, is a document that was graciously provided to me, from a Naturalist who preferred to remain anonymous. It was originally provided in the German language, so I've pasted it in German first. Followed by a translation (attempt) made with Google Translate, into English.
*Note: I realize there is a problem with the chart text colour in the German version of the chart. I'm working on this...

In German:

Ergebnisprotokoll Fledermausdetektor Empfindlichkeiten        1.7.2013

 

Aufgrund von fehlenden Einschätzungen der Empfindlichkeit verschiedener Ultraschallempfangsgeräte haben wir uns entschlossen, einen diesbezüglichen Test durchzuführen. Die Ergebnisse sind natürlich nur als Richtwerte zu sehen und können von Gerät zu Gerät (innerhalb einer Serie) unterschiedlich ausfallen.

Mit einem UltraSoundGate Player BL Light wurde eine Ruf-Sequenz der Zwergfledermaus wiedergegeben. Die Verstärkung lag nach Einstellungen am Gerät bei 20 dB. Die Testumgebung befand sich in einer 70 m langen Lagerhalle, die völlig leer war. Die Entfernung wurde mit einem 50 m Bandmaß festgestellt.

Alle Geräte wurden mit ihrem Mikrofon direkt auf die Schallquelle ausgerichtet. Bei Geräten mit Kopfhöreranschluss entfernte sich die Person mit dem Gerät in der Hand langsam von der Schallquelle weg. An der Stelle, wo das Schallsignal nicht mehr in den Kopfhörern zu hören war, wurde die Entfernung gemessen.

Bei Geräten ohne Kopfhöreranschluss wurden alle 10 m Aufnahmen von Hand ausgelöst und später am Rechner mit der zum Gerät zugehörigen Auswertung Software begutachtet (zum Beispiel Batcorder).

Bei Geräten, die live die Rufmittelfrequenz erfassen und anzeigen (zum Beispiel Batscanner, Batlogger) bildete die Erfassung der Rufmittelfrequenz die Empfindlichkeitsschwelle, d.h. nur bis zu dem Punkt, an dem die Rufmittelfrequenz noch angezeigt wurde galt die Erfassung. In manchen Fällen waren die Rufe darüber hinaus noch hörbar, wurden vom Gerät jedoch nicht getriggert.

Ultraschall Empfänger	Typ	letzte Signale bei	Bemerkung
BATLOGGER alt	Echtzeit Ultraschallgerät mit Aufnahme auf SD Karte	58,70m+	Messbereich durch Hallenende begrenzt
BATLOGGER neu	Echtzeit Ultraschallgerät mit Aufnahme auf SD Karte und Mithörmöglichkeit	58,70m+	Messbereich durch Hallenende begrenzt
BATCORDER	Echtzeit Ultraschallgerät mit Aufnahme auf SD Karte	30m
PETTERSSON D240x	Mischer/Zeitdehnungsdetektor ohne eingebaute Aufnahmemöglichkeit.	16m
PETTERSSON D1000x	Mischer, Teiler, Zeitdehnungsdetektor mit Aufnahmemöglichkeit auf CF Karte	33m
BATSCANNER alte Version	Mischerdetektor mit Rufmittelfrequenzanzeige	17m
BATSCANNER neue Version	Mischerdetektor mit Ruf Mittelfrequenzanzeige	10m
SSF BAT2	Mischerdetektor mit Frequenzskala	23,5m
BATON Batbox	Teiler Detektor mit eingebautem Lautsprecher	5m
CIEL CDB105 R2	Mischerdetektor mit Frequenzskala	18m
CIEL CDB205 R2	Teilerdetektor	31m

Die Mini Horchbox von Battomania erreichte eine Reichweite von 3 m. Hier wird der Testaufbau noch einmal wiederholt, da das Ergebnis zu negativ ist. Die Batlogger werden ebenso noch einmal getestet, um die tatsächliche Reichweite zu vermessen, da bei der angegebenen Entfernung die Halle zu Ende war, jedoch nicht die Triggerung des Gerätes. Des Weiteren kommen noch andere Geräte zum Test. Hierzu zählen die alten Geräte von Sky, das Mikrofon von Dodotronik und andere Geräte, um deren Leihgabe wir ersuchen.

 

In English:

Results log bat detector sensitivities               1.7.2013

Due to the lack of estimates of the sensitivity of various ultrasonic receivers, we decided to perform a test in this regard. The results are of course seen as a guide only and may vary from device to device (within a series).

With an Ultrasound gate Player BL Light a call was - sequence of pipistrelle reproduced. The gain was on the settings on the unit at 20 dB. The test environment was in a 70-meter warehouse, which was completely empty. The distance was determined using a 50 m tape measure.

All devices were aligned using her microphone directly at the sound source. For devices with a headphone port, the person slowly removed with the device in hand away from the sound source. At the point where the sound signal could no longer be heard in the headphones, the distance was measured.

For devices without a headphone jack every 10 m recordings were triggered by hand and later on to the computer with the device associated analysis software assessed (for example batcorder).

For devices, the live capture and display (for example Batscanner, BATLOGGER) the Rufmittelfrequenz capturing the Rufmittelfrequenz formed the sensitivity threshold, ie only up to the point at which the Rufmittelfrequenz was still displayed was the capture. In some cases, the calls were also still audible, but were not triggered by the device.

Ultrasound receiver	Type	signals at last	Comment
BATLOGGER old	Real-time ultrasound machine with recording to SD card	58,70 m +	Range limited by Hall End
BATLOGGER new	Real-time ultrasound machine with recording to SD card and listen-	58,70 m +	Range limited by Hall End
Batcorder	Real-time ultrasound machine with recording to SD card	30m
Pettersson D240x	Mixer / recording time expansion detector without built-in option.	16m
Pettersson D1000X	Mixers, dividers, time expansion detector with option to CF card	33m
BATSCANNER old version	Detector mixer with Rufmittelfrequenzanzeige	17m
BATSCANNER new version	Mixer detector with call center frequency display	10m
SSF BAT2	Mixer detector with frequency scale	23.5 m
BATON Batbox	Divider detector with built-in speakers	5m
CIEL CDB105 R2	Mixer detector with frequency scale	18m
CIEL CDB205 R2	Divider detector	31m

The mini Horchbox of Battomania reached a distance of 3 m. Here is the test structure is repeated once more, because the result is negative. The BATLOGGER also be tested again to measure the actual range, since at the specified distance, the hall was over, but not the triggering of the device. Moreover join other devices for testing. These include the old equipment from Sky, Dodotronik of the microphone and other devices to the loan we ask.

                                                               ------------------------------------------------------------------- 

Amazing stuff, huh? I have some additional (positive) statements to make myself, in regards to The Batlogger M - In an upcoming Post. I'm very surprised by what this Author found with the Petterssons. I would like an opportunity to check these out myself. When testing the Pettersson D240X, I remember that it had very good pick-up range (distance)...

...Next Post will be the full review of The AR125 from Binary Acoustic Technology!