YSI pH and pH/ORP sensors have been carefully designed to perform under all ionic strength conditions, from seawater with a conductivity of 53,000 μS/cm, to "average" freshwater lakes and rivers with conductivities of 200 to 1500 μS/cm, to pure mountain streams with conductivities as low as 15 μS/cm, which has historically been the most difficult medium with respect to accuracy, quick response to pH changes, and minimal flow dependence.
6561FG Flat Glass pH Sensor:
The YSI 6561FG pH sensor features a 'long-life' sealed gel reference, eliminating the need to refill. Produces unattended pH readings in high-fouling environments on 6600EDS sondes.
- Wipeable by 6600EDS sonde brush.
- Glass is well-protected
- Can produce jumpy readings when touched or near source of static interference
- Not ideal for lab use.
Sensor is available for use on the following sonde:
Range: 0 to 14 units
Resolution: 0.01 unit
Accuracy: ±0.2 unit
U.S. EPA ETV