Section 1 Product Overview; Section 2 Specifications - Hach ISENO3181 User Manual

Section 1 Product overview

The Intellical ISENO3181 series probes are digital, combination ion-selective electrodes (ISE) that
measure the concentration of nitrate in 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
2 Reference junction

Section 2 Specifications

Specifications are subject to change without notice.
Specifications
Probe type
Measurement range
Accuracy
Sample pH range
Reference type
Reference junction
Slope
Linear region
Temperature accuracy
Temperature sensor type
Operating temperature
Storage temperature
Response time in linear region < 60 seconds (application dependent)
3 Sensor protection cap
4 Cable
Details
Digital combination probe with a non-refillable reference junction
and a built-in temperature sensor
–6
0.1 mg/L (7x10 M) to 14,000 mg/L (1 M) NO
±0.02 mV or 0.05% (the larger value)
pH 2 to 11 (pH 3 to 5 after the addition of Nitrate ISA)
Ag/AgCl
Double junction (ceramic porous pin and annular porous PTFE)
58 mV/decade (90 to 110% at 25 °C (77 °F) in linear range per
Nernstian theoretical value)
0.7 mg/L to 14,000 mg/L NO
±0.3 °C (±0.54 °F)
30 kΩ NTC thermistor
0 to 50 °C (32 to 122 °F)
5 to 35 °C (41 to 95 °F)
–
—N
3
–
—N
3
English 3