In addition to recording data, the loggers are extremely low power and offer flexible data transfer options via the internet and mobile networks, providing a logging and telemetry solution for every project.

Features: USB-Host, USB-Device, RS-232, Satellite, Cellular, Datalogger, Industrial Communication
Product Highlights: High data availability due to large memory and various communication possibilities, redundant communication, communication via TCP/IP Integrated Web Server, Ultra low power design Industrial design for harsh environment, industrial communication
IP-Communication: Yes
Sensor interfaces: SDI-12, RS-485 (SDI-12), Modbus RTU, analogue-in (voltage and current), Impulse Input, Status Input



  • An integrated web server allows access to the datalogger using standard browsers, no additional software is required
  • Standardized ports and a variety of supported transmission protocols (HTTP, SMTP, FTP) and data formats (including XML) allow simple integration into existing and future systems, thus securing a long-term investment
  • Redundant communication paths ensure complete data availability
  • Extremely low power consumption allows prolonged use at remote locations
  • Every datalogger can be individually equipped for a project, simply needing to incorporate it with the input/output modules for the application
  • Parallel processing of the data from all connected sensors makes short sampling intervals possible
  • Instantaneous values and other information can be read out quickly and conveniently at the measurement site with the unit’s display

• Specifications

OTT netDL 500/1000 IP data logger for hydrological and meteorological applications
Communications interfaces
 Ethernet RJ-45 10 Base-T (netDL 1000)
 USB Host and USB Device
 netDL 1000  2
 netDL 500  1
 Sensor interfaces (standard version)
 SDI-12 V 1.3
 RS-485 (SDI-12/Modbus RTU)
 Pulse/status input  4
 netDL 1000  2
 netDL 500  2
 Status/switch output
 Analogue inputs  configurable
 Analogue inputs, isolated  configurable
 Analogue outputs  configurable
 Serial input module for OTT Sensors
 Barometric input board
 Measuring channels
 Standard  40
 Optionally  120
 IP communication
 Integrated TCP/IP stack  HTTP, HTTPS, FTP, SMTP, Socket…
 Communication paths  GSM/GPRS/3G, Ethernet/DSL, PPP over landline
 Integrated Web server
 Encrypted data transmission HTTPS  SSL 3.0 / TLS 1.0 /1.1/1.2
 Integrated modem (optional)
 GSM/GPRS  900/1800, 850/1900 MHz
 GSM/GPRS; 3G (UMTS/HSPA+)  900/1800, 850/1900 MHz; 800/850, 900, AWS 1700, 1900, 2100 MHz
 Operating system RTOS with power management for minimal power consumption
 Time synchronisation  SNTP (Simple Network Time Protocol)
 Electrical data
 Power supply  9 … 28 V DC (typ. 12 V DC)
 Power consumption at 12 V DC
 Sleep mode  < 250 μA; Sleep mode, impulse active < 10 mA
 Active mode  approx. 25 mA … max. 400 mA (depending on configuration)
 RAM / NOR / NAND Flash  4 MB / 8 MB / 256 MB
 Data memory
 Capacity  up to 1,100,000 values
 OTT Parsivel spectral data  yes
 Graphical dot matrix  122 x 32 pixels
 Illumination  LED backlight
 Control  by jog shuttle
 Status display  2 x LED (variant with integrated modem)
 Environmental conditions
 Temperature range
 Operation  –40 °C … +70 °C
 Storage  –50 °C … + 85 °C
 Internal modem –30 °C … +70 °C
 Display (display on)  –20 °C … +70 °C
 Relative humidity  5 … 95 % (non condensing)
 Mechanical data
 Dimensions (L x W x H)
 netDL 1000  232 mm x 124 mm x 86 mm
 netDL 500 148 mm x 124 mm x 86 mm
 Housing  ABS
 Protection class  IP41






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