Xylem Analytics UK - Let's Solve Water - Formerly YSI Hydrodata
Find YSI on Facebook Follow YSI on Twitter Watch YSI on YouTube

YSI 650MDS Data Display / Logger

Share |

The YSI 650 is a field rugged display / datalogger capable of communicating with any YSI 6-Series multiparameter instrument

650MDS - Multiparameter Display System

Get Support

Have a question about your YSI 650MDS Data Display / Logger? Check out the support page with resources compiled just for you.

Contact Technical Support


Need service for your system? Here you’ll find authorized service centers and instructions on how to get the service you need.

Product Service


We have a large pool of water quality and hydrology instruments available to you for rental.


The YSI 650 is designed for use in the field. Features include a drop resistent case, IP67 waterproof rating, three year warranty and military connectors.

Four options are available depending on requirements:

650-01 - Display with low memory (150 data sets) and no internal datalogger

650-02 - Display with high memory (50,000 data sets), 200 site names and no internal datalogger

650-03 - Display with low memory (150 data sets) and internal datalogger

650-04 - Display with high memory (50,000 data sets), 200 site names and internal datalogger

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.


  • 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



YSI650MDS Display & Datalogger Specifications

Temperature Operating
-10 to +60°C for visible display
-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
Dimensions Width
4.7 in, 11.9 cm
9 in, 22.9 cm
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
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


3 years


CE, EU Battery compliance, FCC, IP-67, WEEE, and C-Tick
Assembled in the USA

Ordering Information

Item # Description
650-01 Instrument, standard memory
650-02 Instrument, high memory
650-03 Instrument, standard memory, barometer
650-04 Instrument, high memory, barometer
6113 Rechargeable battery pack kit with 110 volt charger and adapter cable
616 Charger, cigarette lighter
4654 Tripod
614 Ultra clamp, C-clamp mount
5081 Carrying case, hard-sided
5085 Hands-free harness
5065 Form-fitted carrying case
6115 Y-cable for interface with user-supplied GPS system




<< Back to Products page