Hach ISEF121 Series, Руководство пользователя

Страница: 5 / 18

Section 1 Product overview
The Intellical ISEF121 series probes are digital, combination ion-selective electrodes (ISE) that
measure the concentration of fluoride in wastewater, drinking water and general water samples. The
probes have a built-in temperature sensor, a non-refillable gel reference and non-replaceable
membranes. Refer to
Figure 1 .
Figure 1 Probe overview
1 Sensing element 3 Sensor protection cap
2 Reference junction 4 Cable
Section 2 Specifications
Specifications are subject to change without notice.
Specifications Details
Probe type Digital combination probe with a non-refillable reference junction
and a built-in temperature sensor
Measurement range 0.01 mg/L (5x10
–7
M) to 19,000 mg/L (1 M) F
–
Accuracy ±0.02 mV or 0.05% (the larger value)
Sample pH range pH 4 to 8 (must be pH 5.0 to 5.5 after the addition of Fluoride ISA)
Reference type Ag/AgCl
Reference junction Single junction (annular porous PTFE)
Slope 59 mV/pF (90 to 110% at 25 °C (77 °F) in linear range per
Nernstian theoretical value)
Linear region 0.1 mg/L to 19,000 mg/L F
–
Temperature accuracy ±0.3 °C (±0.54 °F)
Temperature sensor type 30 kΩ NTC thermistor
Operating temperature 5 to 50 °C (41 to 122 °F)
Storage temperature 5 to 35 °C (41 to 95 °F)
Response time in linear region < 60 seconds (application dependent)
English 3