Holux M-241 – Outdoor GPS Datalogger

The Holux M-241 GPS Logger enables real-time recording of coordinates and provides an easy-to-use travel logging service.

The M-241 can record up to 104,724 positions (as of firmware 1.12) with longitude, latitude, time and altitude.

The M-241 is a Holux Bluetooth GPS receiver with datalogger and LCD display. The design of the M-241 is based on the GPS solution from Media Tek Inc. (MTK GPS – MT3318) low-power chip architecture.

Geo-Tagging

The log file can be transferred to the PC for analysis via a USB connection. Due to the standard format used, the log files can also be used by many online services, such as Google Maps, Google Earth, which are interpreted correctly.

You can also combine the recorded positions with the photos taken by your digital camera to provide a geographically accurate price history (GeoTagging). Thus, walking routes or itineraries can be tracked and documented.

Display, Bluetooth, NMEA

On the LCD screen of the logger, the position information, movement speed, the free space for the recording and the date/time can be controlled directly at any time. The M-241 supports the distance and time recording modes, the kilometers and miles units.

Since the M-241 has a Bluetooth interface, even wireless connections can be realized without any problems.

File formats provided by the program (*.kml -Google Earth, Binary, GPX and *.txt NMEA file format).

Battery lifetime

The M-241 does not have a battery charging function. Powered by a Mignon (AA) battery, it can record satellite information for up to 12 hours. Various recording modes can be preset with the supplied program.

GPS

Using advanced technology, the M-241 can simultaneously track signals from up to 32 satellites. It records satellite signals every 0.1 microseconds and updates the position data every second.

Holux M-241 delivery package

Delivery package

  • Holux M-241
  • Mignon battery
  • Car power adapter 12V
  • USB-Datacable
  • Program and driver CD
  • Short instruction in english language (printed)
  • Software ezTour
    (License for three installations)

Technical specifications

Modell

ManufacturerHolux
ModelM-241
Product nameM-241
Product number (P/N) 
GTIN / EAN4711140530123
UPC
Market availability2008 – 2018

Physical data

Weight39 gr (without batteries)
Size32.1mm X 30mm X 74.5mm
Operating temperature-0°C to +50°C
Air humidity5% bis 90% (without condensation)

Interface

BluetoothVersion 1.2 compatible
Bluetooth rangeto 10m
Frequency2400 – 2480 GHz
ModulationFHSS, GFSK
Channels79
Signal sensitivity-85 dBm
Signal output+2 dBm
USBVersion 1.1
Connectormini-USB
Transfer datayes
Transfer powerno

Memory

Built-in memoryup to 130.000 GPS-datapoints
External memory
Export formatKMZ

Display

LCD-displaystatus, time, position, speed, distance, setup

Power supply

AA battery8 to 12h continuous operation
with Bluetooth = off
AA battery4 to 6h continuous operation
with Bluetooth = on
AA accuup to 6h continuous operation
with Bluetooth = off
AA accuup to 3h continuous operation
with Bluetooth = on
Accu charging function
external power supplymini-USB, 5V

GPS chipset

CPUMTK 3318
Channel32
ReceiverL1, 1575.42 MHz
Signal refresh rate10 Hz
Position refresh rate1 Hz
Position refresh rate opt.5 Hz (without logging)
Hot startca. 1 Sec.
Warm startca. 33 Sec.
Cold startca. 36 Sec.

GPS Antenna

built-in antennaPatch antenna
Sensitivity tracking signal-159 dBm
Sensitivity tracking position-156 dBm
Connector ext. antenna

GPS position accuracy

Normalca. 3m (without SA)
Normal speedca. 0,1m/sec (without SA)
DGPS SBAS (EGNOS,WAAS)
DGPS SBAS speed
DGPS GBAS
DGPS GBAS speed

GPS dynamic

Dyn. heightmax. 18km
Dyn. speed515m/sec
Acceleration± 4 G max.
Jerkmax 20 m/sec.

GPS protocol

NMEA protocolNMEA0183 v3.1
NMEA format$GPGGA, GSA, GSV, RMC, VTG
Height calculationWGS84
Format optional
Baud rate38400 bits/sec
Data/Check/Stop -Bit8/N/1

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