In-Situ Aqua TROLL 400 Operators Manual - Manual (Page 9)

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pH Sensor Specifications
Accuracy ±0.1 pH unit from 0 to 12 pH units
Range 0 to 12 pH units
Resolution 0.01 pH unit
Sensor Type Replaceable pH/ORP combo sensor
Response
Time
<15 sec., pH 7 to pH 4
Units of
Measure
pH units
Methodology Std. Methods 4500-H+ EPA 150.2
Sample Temperature Sensor Specifications (Probe)
Accuracy ±0.1° C
Range -5 to 50° C (23 to 122° F)
Resolution 0.01° C or better
Sensor Type Fixed
Response
Time
<30 sec.
Units of
Measure
Celsius, Fahrenheit
Methodology EPA 170.1