YSI 650 MDS Multi-Parameter Display System

Log real-time data, calibrate YSI 6-Series sondes, set-up sondes for deployment, and upload water quality data to a PC with the feature-packed YSI 650MDS (Multiparameter Display System). Designed for reliable field use, this display and data logger features a waterproof IP-67, impact-resistant case.

  • Features
  • Specifications

Battery Life
With the standard alkaline battery configuration of 4 C-cells, the YSI 650 will power itself and a YSI 6600 sonde continuously for approximately 30 hours. Or, choose the rechargeable 120 v battery pack (YSI Part # 6113) option with quick-charge feature.

Optional Barometer
Temperature-compensated barometer readings are displayed and can be used in dissolved oxygen calibration. Measurements can be logged to memory for tracking changes in barometric pressure.

Optional GPS Interface
Designed to NMEA protocol, the YSI 650MDS will display and log real-time GPS readings with a user-supplied GPS interfaced with YSI 6-series sondes.

Memory Options
Standard memory will allow for approximately 150 data sets. Exact logging capacity is dependent on the number of active parameters in the 6-series sonde. Optional high memory (1.5 mB) would make it possible to easily upload the data from 7 sondes, each of which have data files of approximately 75 days at a 15-minute sampling interval.


  • Compatible with EcoWatch® for Windows® data analysis software
  • User-upgradable software from YSI's website
  • Menu-driven, easy-to-use interface
  • Multiple language capabilities
  • Graphing feature
  • Three-year warranty
Certifications IP-67, WEEE, EU Battery compliance, FCC, CE, and C-Tick. Assembled in the USA.
Connectivity / Communications RS-232 to all sondes for data transfer to PC & software updates
Connector MS-8, meets IP-67 specification
Desktop Software Compatible Eco-Watch
Equipment used with Any 6-Series Sonde
GPS NMEA 0183, requires user-supplied GPS and YSI 6115 Y-cable
Graphic Display LCD with 320 x 240 pixels with backlight
Keypad including instrument on/off, period key, 2 vertical arrow keys, and minus key, esc, enter, 2 horizontal arrow keys, backlight on/off, 10 number/letter entry keys, 20 keys
Logging Capabilities Yes
Memory 10KB for 150 data sets
Multiparameter Yes
Operating Temperature -10 to +60 C
Power 4 C-size alkaline batteries or Ni metal hydride battery pack
Sampling Yes
Storage Temperature -20 to +70 C
Warranty 3 years
Waterproof IP-67
650 MDS Display & Datalogger Specifications  
Temperature - Operating -10 to +60°C for visible display
Temperature - Storage -20 to +70°C
Waterproof Rating IP-67 for both the standard alkaline battery configuration and for the rechargeable battery pack option
Connector MS-8; meets IP-67 specification
Width 4.7 in, 11.9 cm
Length 9 in, 22.9 cm
Weight 2.1 lbs, 0.91 kg (batteries installed)
Display VGA; LCD with 320 by 240 pixels with backlight
Power - Standard 4 alkaline C-cells with detachable battery cover
Power - Optional Ni metal hydride battery pack with attached battery cover and 110/220 volt charging system
Communications RS-232 to all sondes, for data transfer to PC, and for software updates
Optional GPS NMEA 0183; requires user-supplied GPS and YSI 6115 Y-cable
Backlight 4 LEDs illuminating LCD; user-selectable
Keypad 20 keys, including instrument on/off, backlight on/off, enter, esc, 10 number/letter entry keys, 2 vertical arrow keys, 2 horizontal arrow keys, period key, and minus key
Warranty 3 years
Certifications CE, EU Battery compliance, FCC, IP-67, WEEE, and C-Tick; Assembled in the USA

Specifications indicate typical performance and are subject to change.

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