Used YSI 6920 V2-2 Water Quality Sonde

Used YSI 6920 V2-2 Water Quality Sonde


The YSI 6920 V2-2 sonde is an economical logging system, ideal for long-term in situ monitoring and profiling of temperature, conductivity, pH, ORP, dissolved oxygen, and turbidity.


  • Internal battery pack & memory for long-term, unattended deployments
  • All sensors are field-replaceable, and optical sensors feature self-cleaning wipers
  • Compatible with NexSens real-time data logging systems
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Why Buy From Fondriest?


Perfect for harsh fouling environments, YSI's optical sensors feature an integrated wiper that prevents the impacts of biofouling, a corrosion-resistant titanium wiper shaft, and replaceable seals. 

The YSI 6920 V2-2 sonde features an internal battery pack with memory for long-term, unattended deployments. Additionally, the sonde can be powered by a 650 display unit for spot sampling applications.

The YSI 6920 V2-2 has the following available ports:


  • (1) Temperature/Conductivity
  • (1) pH or pH/ORP
  • (1) ISE (Nitrate, Ammonium, or Chloride)
  • (2) Optical (Dissolved Oxygen, Turbidity, Chlorophyll, Blue-Green Algae, and/or Rhodamine)
Notable Specifications:
  • Medium: Fresh, sea, or polluted water
  • Operating Temperature: -5 to +50 C
  • Storage Temperature: -10 to +60 C
  • Communications: RS-232, SDI-12
  • Software: EcoWatch
  • Diameter: 2.85" (7.24cm)
  • Length: 18" (45.7cm)
  • Weight: 4 lbs. (1.8kg)
  • Internal Power: 8 AA-size alkaline batteries
  • External Power: 12 VDC
What's Included:
  • (1) YSI 6920 V2-2
  • (1) Temperature/conductivity sensor
  • (1) Soft-sided carrying case
  • (1) EcoWatch for Windows software CD
  • (1) Calibration cup
  • (1) Probe guard
  • (1) 6-Series operations manual
  • (1) Maintenance kit
Image Part # Product Description Price Stock Order
Used YSI 6920 V2-2 Water Quality Sonde 6920V2-R Used 6920 V2-2 Sonde with temperature/conductivity sensor Usually ships in 3-5 days
Image Part # Product Description Price Stock Order
YSI 6561 pH Sensor 006561 6561 pH sensor Usually ships in 3-5 days
YSI 6565 pH/ORP Sensor 006565 6565 pH/ORP sensor Usually ships in 3-5 days
Used YSI 6150 ROX Dissolved Oxygen Sensor 6150-R Used 6150 ROX optical dissolved oxygen sensor with self-cleaning wiper In Stock
Used YSI 6136 Turbidity Sensor 6136-R Used 6136 turbidity sensor with self-cleaning wiper In Stock
YSI 6-Series Sonde Field Cables 006090 6090 field cable, 8 ft. In Stock
Used YSI 6160 Flow Cell 6160-R Used 6160 flow cell, for use with YSI 6820 & 6920 Usually ships in 3-5 days

Used YSI 6920 V2-2 Water Quality Sonde Reviews

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Questions & Answers

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My DO% samples read low and then high to low, is this a bad reading?
The initial power up can make the first two DO% readings read low. These readings can be disregarded.
My sonde is reading a negative value for turbidity, did I calibrate incorrectly?
A sonde (even if cleaned properly) can contaminate to almost 1.0 NTU. Typically the average contaminant level ranges from 0.2 to 0.8 NTU. With this knowledge, you can enter this offset (0.5 NTU) using the sonde's One-Point Calibration feature. This calibration is only done after a two- or three- point calibration is completed. To do a One-Point Calibration after a two- or three- point calibration: Place the sonde in a container of zero standard or filtered DI water. Use of the supplied calibration/storage cup is recommended; however, any generic glass or plastic container can be used as long as the probe guard is installed. Enter the Turbidity offset as 0.5 NTU, operate the wiper and inspect for air bubbles. Wait at least 60 seconds after the last wiper to accept the calibration point.

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