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Product comparison

What is the difference of our data logger?

All data logger uses our standard ASCII NMEA-0183 data protocol for data storage, real-time data transmission or configuration and control commands. All data logger consist of industrial grade components for harsh environmental conditions or extended operating live. Only industrial solid-state technology such as CompactFlash (CF) or SecureDisk (SD) is used for storage.

MicroDI® data logger

The MicroDI® data logger can acquire standard analogue signals in high 24 Bit resolution. In addition versatile digital IO-signals are available, some for switching power or as a PWM output.

The small form factor and ultra-low-power consumption enables long-time deployments with small battery capacities.

The MicroDI® is used as a simple, small and ultra low-power but high-precision data logger. In a special configuration the data logger comes with a Li-Ion battery (MicroDI® PowerLogger).

The PMM power-manager module of the MicroDI® with its optional calibrated real-time clock (1 ppm, time error < 30s/year) can be used stand-alone or embedded for other external devices.

When small dimensions are important pressure housings with Ø50mm are used. More external sensors could be attached when the logger comes in a Ø90mm housing.

NetDI® data logger

The NetDI® data logger is used for high-speed measurements up to 10kHz or higher. For control applications special options are available. With its state-of-the-art 32-Bit ARM processor, large memory and a real-time kernel internet connectivity or broadcasting of videos are possible.

With its low power consumption the NetDI® can be used for high-sophisticated underwater monitoring tasks.

Special industrial data acquisition boards with 24 Bit resolution and fully galvanic isolation are connected with an internal and expandable RS-485 bus. Comparable IO modules are used to provide digital or relay outputs.

Pressure housings with Ø168mm are used. For full-ocean-depth ratings Ø180mm housings are used.

In a special configuration the data logger comes with a Li-Ion battery (NetDI® PowerLogger™).

For deck-units a touch-screen is connected to visualize real-time data and diagnostic menus. With many interfaces, internet connectivity and high-speed data acquisition it is a versatile tool for sophisticated or high-speed measurement systems.

On request, the NetDI® can be produced for high reliable demands up to SIL-2.

 

SmartDI® data logger

Please note: the SmartDI® is not longer recommended for new projects. The new NetDI® is used for all high-performance tasks. The SmartDI® is only available on request for special tasks. The support for delivered SmartDI® is as usual.

The SmartDI® data logger is used for complex measurements or control applications, with external sensors or actors such as valves or pumps. To reduce the power consumption the SmartDI® can be powered off and on from an external device, e.g. a special MicroDI® PMM power-manager module. Standby modes are not available.

Special industrial data acquisition boards with 24 Bit resolution and fully galvanic isolation are connected with an internal and expandable RS-485 bus. Comparable IO modules are used to provide digital or relay outputs.

Subsea data loggers with 4 serial ports or up to 6 connectors for external sensors are integrated into a Ø90mm housing. For applications with more serial ports a Ø168mm housings is used. For full-ocean-depth ratings could be fulfilled by a Ø180mm housing.

In a special configuration the data logger comes with a Li-Ion battery (SmartDI® PowerLogger™) to provide power for itself and the attached sensors.

For deck-units or for OceanPack™ systems a touch-screen is connected to visualize real-time data and diagnostic menus. Up to 36 serial ports can be used.

The SmartDI® data loggers are used to control analyzers or complete systems. The real-time multitasking kernel can acquire data from up to 250 devices and 10000 channels in parallel. The integrated proprietary Soft-PLC takes control about time or combined value events. Nutrient analyzers, samplers and other devices can be programmed. With GPS inputs data is geo-referenced and a position control is realized e.g. for automatic cleaning sailing into the harbour.

With many interfaces, calibration formulas and control functions it is a versatile tool for control or measurement Systems.

MicroDI® SmartDI® (obsolete) NetDI®
Technology Embedded low-power 8-Bit Controller Embedded industrial PC  Embedded low-power 32-Bit ARM Controller
Power consumption (typ.) Sleep: < 10 µA

Run: 20mA

Sleep: N/A

Run: 0.5A (1A max)

Power off supported

Sleep: < 10 µA

Run: 200mA TBD

Form factor Micro board 40x100mm PC/104

or other PC boards

 Board 160x100mm with extension piggy-back modules (shields)
Pressure housing (typ.) 50mmØ (1000m)

60mmØ (to 6000m)

 

90mmØ (Check-card)

168mmØ (300m)

180mmØ (to 6000m)

168mmØ (300m)

180mmØ (to 6000m)

Data Interfaces 2 x RS-232/485

Extension to 6 x RS232/485

4 x RS-232

Extension up to 36 x RS-232, optional RS-485

 2 x RS-232/485

Extension up to 8 x RS-232/485

Analogue Inputs (ADC) 8 channels 24 Bit, 18 bit eff. Optionally serial modules 8 channels, 24 Bit

Expandable

8 channels 24 Bit, 18 bit eff.

Expandable

Analogue Inputs isolation No, optional Yes, 3000V  optical isolated
Storage Internal µSD Card

max. 32 GB (FAT32)

ASCII NMEA-0183 data

Internal CF card (System), external CF card (data)

max. 2 GB each (FAT16)

ASCII NMEA-0183 data

Internal µSD Card, optional additional 2 x 32GB USB memories

max. 32 GB each (FAT32)

ASCII NMEA-0183 data, download via USB or wireless

Real-time output ASCII NMEA-0183 data

typ. 1Hz

ASCII NMEA-0183 data

typ. 1 Hz

 ASCII NMEA-0183 data

typ. 1 Hz

Real-time clock (RTC) Yes, calibrated up to 1ppm (< 30s/year) Yes, optional additional MicroDI power-board with calibrated RTC or GPS time base  Yes, calibrated up to 1ppm (< 30s/year)
Sensor interfaces Analogous or Serial (digital) Analogous or Serial (digital), up to 60 driver of Major vendors are implemented  Analogous or Serial (digital)
PLC function (control Systems) No Soft-PLC, fully configurable can use any output. Many time and event trigger functions.  Yes, pre-configured
Power switching 4 channels 2,5A each

Configurable on/off conditions e.g. for long-time deployments

Yes, expandable by MBUS RS-485 relay modules 4 channels 2,5A each

Configurable on/off conditions e.g. for long-time deployments.

Expandable by MBUS RS-485 relay modules

Display No. Configuration via Serial commands only. VGA Monitor e.g. 8″ for graphical quick-look and configuration.

For low-power or underwater  applications without Video.

 7″ Touch screen for graphical quick-look and configuration.

For underwater applications remote connected (external) box

Keyboard, Mouse No. Digital inputs e.g. buttons are provided. Yes. With touch screen no mouse is required. Keyboard for alphanumeric entries  No, touch screen operation only.
Expandable Not yet MBUS RS485 industrial bus for e.g. IO and AD modules.

PC/104 boards.

Internal shields

MBUS RS485 industrial bus for e.g. IO and AD modules

Production Quality and functional safety IPC-A-600/610 class 2 or 3

SIL-1 on request

Commercial/industrial standard, no special IPC class IPC-A-600/610 class 2 or 3

Up to SIL-3 on request. Special IDE tools enables SIL-3 firmware.

Qualifications Type approved according MIL-STD 810G, ISO 13628-6, API17f Commercial industrial components Planned: type approval according MIL-STD 810G, ISO 13628-6, API17f