Hach-Lange HQD - Sodium (Na+) Ion Selective Electrode ISENa - Manual

1
DOC272.53.80027 User instructions
Sodium (Na + ) Ion Selective Electrode: Model ISENa38101 or
ISENa38103 Electrode
Safety Information
Precautionary Labels
Read all labels and tags attached to the instrument. Personal injury or damage to the
instrument could occur if not observed. A symbol, if noted on the instrument, will be included
with a danger or caution statement in the manual.
Overview
The ISENa38101 or ISENa38103 electrode is a refillable combination sodium electrode with a
built-in temperature sensor. The ISENa38101 or ISENa38103 electrode is available with a 1 or
3 meter cable and is intended for laboratory use. The electrode measures sodium
concentration in water samples. A 59 mL bottle of 0.02M NH
4
Cl Electrode Filling solution is
included with the electrode.
Specifications
Note: Specifications are subject to change without notice.
Electrical equipment marked with this symbol may not be disposed of in European public disposal systems after
12 August of 2005. In conformity with European local and national regulations (EU Directive 2002/96/EC),
European electrical equipment users must now return old or end-of life equipment to the Producer for disposal at no
charge to the user.
Note: For return for recycling, please contact the equipment producer or supplier for instructions on how to return
end-of-life equipment, producer-supplied electrical accessories, and all auxiliary items for proper disposal.
This is the safety alert symbol. Obey all safety messages that follow this symbol to avoid potential injury. If on the
instrument, refer to the instruction manual for operation or safety information.
Specification Details
Electrode type
Digital combination electrode with a double junction, refillable junction reference and a
built-in temperature sensor
Electrode resistance < 800 Mohms at 25 °C
Range 0.023 mg/L (1x10 -6 M) to 23,000 mg/L (1 M) Na +
Sample pH range pH 4 to 14, must be adjusted to > pH 9 per Sodium ISA
Linear region 1.4 mg/L to 23,000 mg/L
Slope -59 mV/pNa (98 to 103% at 25 °C per nernstian theoretical value)
Operating temperature range 0 to 50 °C
Storage temperature range 5 to 40 °C
Junction Double ceramic porous pin
Reference type Ag/AgCl
Fill solution 0.02M NH
4
Cl
Response time in linear region 1 to 2 minutes in sample concentration > 1.4 mg/L
Minimum sample volume 25 mL
Dimensions Diameter: 12 mm, Length: 103 mm, Total length: 220 mm, Cable length: 1 or 3 meter
Cable connection Digital output and connector compatible with HQd meters
Ionic strength adjusters Hach sodium ISA
Recommended standard solutions 10, 100, and 1000 mg/L Na + standard solution