ML-417 – Remote data logger

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Low power data logger

The ML-417 is a small, low power, cost effective remote data logger with or without a built-in cellular modem (LTE-m & NB-IoT). Ideal for measuring outdoor environments and collecting valuable data in environmentally challenging applications. The ML-417 has a built-in temperature sensor, 8GB micro SD card and a 2FF SIM card slot.

The ML-417 is available in several editions and can be configured with or without cellular modem:

  • ML-017: Without cellular modem
  • ML-417: With global LTE-M & NB-IoT modem
remote data logger

Our multi-purpose data logger is customizable for any application

Available with several  power provisions (e.g. batteries, DC input, solar panel input etc.)

2 current loop inputs, 2 voltage inputs, 1 potentiometer input and 3 digital inputs.

Provided with a serial port to capture measurements from ASCII, MODBUS, NMEA or SDI-12 compatible sensors

Up to 8 mathematical channels are available to calculate meaningful engineering values derived from sensor input values

Cost efficient data logging solution

A self providing monitoring station

When equipped with the integrated solar panel a complete self providing remote monitoring station can be arranged, all you need is a logger and applicable sensor(s). This self providing cellular logger is costs saving, because you don’t need: a) solar panels, b) big batteries, c) cellular modem and d) encapsulating cabinet.

Please contact us or one of our distributors for product inquiries.

remote monitoring station

ML-417 remote data logger features

  • Data logging
    › 1 second to 1 day intervals
    › regular, alarm and independent intervals
    › 8GB industrial grade micro SD-Card (file storage), 512kB FLASH (program storage), 64kB SRAM (runtime memory)
  • 5x analog inputs (12 bit resolution & <0.2% FS accuracy)
    › 2x current loop inputs (0/4..20mA)
    › 2x voltage inputs (0..10V)
    › 1x voltage/potentiometer input (0..3.3V, max. 10Mohm) a/o to connect a wind direction sensor
  • 3x digital inputs (0..5V)
    › State mode (on/off)
    › Alarm mode
    › Trigger mode (measurement, data push, camera picture)
    › Pulse counter mode (max 10kHz), e.g. to connect a flow meter, rain gauge or reed relay based wind speed sensor
    › Activity counter mode, e.g. to monitor pump running hours
  • Internal sensors (a/o battery, processor temperature, signal strength)
  • 8x calculation channels, to derive engineering values from sensed values using mathematical operators and functions (e.g. cos, sin, atan2, ln, sqrt). For example the usecase to calculate dissolved oxygen in saline water.
  • 8x aggregation channels, min/max, average, gust, std dev, rate of change and up to 3 different percentiles sampled at 1Hz max. for example the usecase to record 2 or 10 minute wind speed averages sampled at 1Hz.

  • 1x Serial port for connecting external sensors (RS-232, RS-485 or SDI-12)
  • Serial port drivers
    › ASCII: Sensors autonomously outputting readable lines of numeric values
    › MODBUS: Read-out value registers from MODBUS (RTU/ASCII) slave devices
    › NMEA-0183: Sensors outputting standard and custom sentences
    › SDI-12: Read-out of up to 16 devices with up to 20 parameters per device using aC!, aM!, aCx! or aMx! commands

  • 1x digital open collector alarm output to switch on a relay in case a parameter value is outside its limits (e.g. a high water level)
  • Data push
    › 1 minute to 1 day intervals
    › regular and alarm intervals (direct push on alarm raise or fall)
    › native txt, json, csv, jpg (pictures) or Sparkplug B payload format
    › MQTT(S), HTTP(S), FTP(S)1) or secure TCP(AES-128)
  • Alerts by SMS, e-Mail or MQTT
  • Configuration by USB (local), secure TCP tunnel (remote) or optional Bluetooth LE (wireless)
  1. FTPS (TLS Explicit)

ML-417 remote data logger specifications

  • Built-in cellular data modem (ML-417)
    › LTE-M (LTE category M2)
    › NB-IoT (LTE category NB2)
    › IPv4, IPv6, NTP, TLS (1.1, 1.2 or 1.3), SNI
    › Bands: 1,2,3,4,5,8,12,13,18,19,20,25,26,27,28,66,71 & 85
    › 2FF (Class B) SIM-CARD slot.
    › Integrated GSM antenna, external GSM antenna optional.
  • Power consumption
    › 60mA@3.6V average operating2) current during a duty cycle of less than 1 sec3) per log interval.
    › 250mA@3.6V average operating current during 20..60 sec. data transfer
    › <80uA@3.6V sleep current
    › 12V@200mA switchable power outlet to power external sensors
    › Configurable daily operation time bracket to limit power consumption (e.g. 07:00AM to 20:00PM or 21:00PM – 06:00AM)
  • Power supply options4)
    › 1 or 3 D-size 3.6V Lithium battery holders
    › 1x 26650 3.2V LiFePO4 battery holder with charger and 1Wp solar panel integrated in cover
    › 4x 18650 3.2V LiFePO4 battery holders with charger for 21VOC external solar panel
    › 12V battery charger for 21VOC external solar panel
    › 8..28V DC-Adapter
    › 8..28V DC-Adapter with 3x AA NiMH holders charger for backup
    › 8..28V DC-Adapter with D-size 3.6V Lithium backup battery holder
  • Rugged and waterproof IP67 enclosure (150x120x130mm)
  • Integrated GSM antenna, external GSM antenna optional
  • Wide temperature operating range –30°C +75°C

2) 60mA if no external sensors need to be powered.
3) <1 sec. if external sensors are responsive and don’t require time to “warm up”.
4) Batteries not included.

ML-417 remote data logger editions

The ML-417 is available with or without a built-in cellular modem (LTE-m & NB-IoT) and in several editions. An ML-417ADS is equipped with (A)nalog, (D)igital and (S)erial inputs. For cost reduction an ML-417DS lacks the analog inputs and an ML-417AD the serial ones. All editions below are sharing about the same ML-417 main PCB, but differ depending on the chosen enclosure cover option. The cover can be a blind cover or a cover with integrated solar panel.

The different covers are giving the following ML-417 Editions:

ML-417 Battery powered editions

Battery powered data logger
ML-417DS-LI, ML-417AD-LI, ML-417ADS-LI

A D-Size 3.6V Lithium battery powered ML-417 with blind cover (Using a SAFT-LSH20 or GEBC-ER34615M battery is recommended). This edition is best suitable for monitoring with longer log intervals >=1h and transfer intervals >=4h.

ML-417DS-3LI, ML-417AD-3LI, ML-417ADS-3LI

Same as above, but equipped with D-size holders to host up to 3 Lithium SAFT LSH20 batteries safely, with a combined lossless capacity of 39000mAh.

ML-417 Solar powered editions

ML-417-PV solar powered data logger
ML-417DS-PV, ML-417AD-PV, ML-417ADS-PV

An ML-417 with cover with integrated 1Wp tiny solar panel, charger and holder for one 26650 3.2V LiFePO4 battery. The battery is protected against damage by over charging and from damage by depletion by temporarily switching off the power to the data logger, giving the sun the chance to replenish the battery.

This edition is best suitable for monitoring with moderate log intervals >=5 min and transfer intervals >=15 min.

ML-417DS-LFP integrated charger solar panel data logger

An ML-417 powered from 1 to 4 LiFePO4 18650 3.2V cells. The integrated charger can be used to charge the internal batteries from an external 36-cells 12Vnom/21Voc solar panel.

This edition is best suitable for applications with power hungry sensors for monitoring with low log intervals <5 min or transfer intervals <15 min.

External 12V data logger

An ML-417 to be powered from an external 12V Sealed Lead Acid/LiFePO4 battery, the integrated charger can be used to charge the 12V battery from an external 36-cells 12Vnom/21Voc solar panel.

This edition is best suitable for applications with power hungry sensors, sensors that require continuous power or for monitoring with fast transfer intervals <=5 min.

ML-417 DC powered editions

ML-417DS-DC, ML-417AD-DC, ML-417ADS-DC

An externally 8/28V DC powered ML-417 with blind cover.

This edition is best suitable when a reliable external DC source is easily available or for monitoring with low log intervals <5 min or transfer intervals <15 min.

As above but with a D-Size 3.6V Lithium back-up battery holder (Using a SAFT-LSH20 or GEBC-ER34615M battery is recommended).

This edition is best suitable when a external DC source is easily available but suffering from occasional outages.


An externally 8/28V DC powered ML-417 with blind cover and charging circuit for 3x AA NiMH (backup) batteries. The charging circuit protects the batteries from damage by over charging.

This edition is best suitable when a (non continues) external DC source is easily available or for monitoring with low log intervals <5 min or transfer intervals <15 min.

Tips: When using solar panels we recommend to use panels with a VOC of 17V or higher as well as panels not smaller than 3Wp. We also recommend to use LSD NiMH AA batteries with the highest capacity available (2600 mAh).

ML-417 Display editions


As ML-417ADS-LFP/SLA/DC-(LI/NM), but with a cover with integrated 3.5″ resistive touch color TFT display (320×240 pixels). The display is used for displaying actual values and historical data as graphs, its not meant for configuration purposes.

Note: The ML-417-TFT is not waterproof and not designed for outdoor use.

ML-417 remote data logger accessoires

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Other useful links

Power consumption calculator

power consumption calculator

Our online calculator can be used to estimate the battery life of your application or to determine the right settings fitting local solar power yield.

Application notes

Data logger application notes

For additional tips, refer to our application notes. These are valuable resources to improve your understanding of our data loggers.

Wireless Bluetooth interface

Data logger bluetooth interface

By adding the tiny ML-OU-BLE option board onto your ML-417 data logger, you can add a wireless Bluetooth interface. Convenient for wireless configuration.

Discover the possibilities

Want to know more about what YDOC can do to help you with your quest for the right data logger? Do not hesitate to get in contact.