Datasheet

V1.01/EN/00438069
Page 2/21Data Sheet 201020
JUMO GmbH & Co. KG
Delivery address: Mackenrodtstraße 14
36039 Fulda, Germany
Postal address: 36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.net
JUMO Instrument Co. Ltd.
JUMO House
Temple Bank, Riverway
Harlow, Essex CM 20 2DY, UK
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumo.co.uk
JUMO Process Control, Inc.
6733 Myers Road
East Syracuse, NY 13057, USA
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Internet: www.jumousa.com
20102000T10Z001K000
Active element of pH and redox electrodes
Reference system design variations (reference electrode)
The only reference electrolytes used for JUMO tecLine electrodes are those that have no silver ions. A cartridge-style conduction system contains
the silver/silver chloride (Ag/AgCl). Various forms of diaphragm are used.
Other pH and redox electrodes can be found in the following data sheets:
Membrane
glass
or active
component
Designation pH or
redox range
Temperature range Typical application
UW glass Universal glass pH 0 to 12
(briefly pH 14)
-5 to +80 °C Water and wastewater engineering, process
measurement technology, low-ion media
HA glass High-alkaline glass pH 0 to 14 -5 to +80 °C For heavily alkaline media (above pH 12)
HT glass High-temperature glass pH 0 to 14 0 to 135 °C For temperatures above 80 °C
or for heavily alkaline media
DS glass Steam-sterilizable glass pH 0 to 12 -5 to +80 °C
briefly up to 130 °C
(20 min)
Biotechnology, pharmaceutical and food
technology, sterilization processes
C glass Fluoride-resistant glass pH 0 to 11 -5 to +50 °C Media containing fluorides (hydrofluoric acid)
(c(HF) ≤ 1000 mg/l)
Platinum tip Redox measurement ±2000 mV -10 to +135 °C Chromate reduction, nitrite oxidation,
swimming pool and drinking water disinfection
Gold tip Redox measurement ±2000 mV -10 to +135 °C Cyanide oxidation, water disinfection
Diaphragm type Explanation Possible
electrolytes
Recommended minimum
conductivity of the medium
Typical application/
limitations
1× ceramic diaphragm High-quality zirconium
dioxide diaphragm
a
a
Zirconium dioxide diaphragm: high-quality ceramic material of consistent porosity. This means optimum diffusion properties.
Polymerized
solid electrolyte
Without salt reserve: 100 µS/cm
With salt reserve: 50 µS/cm
General water or wastewater
engineering, industrial processes, etc.
Liquid KCl 5 µS/cm
3× ceramic diaphragm As above, the increased
number means more
KCl escapes
Polymerized
solid electrolyte
Without salt reserve: 50 µS/cm
With salt reserve: <50 µS/cm
For polluted or low-ion media;
low-temperature applications
Liquid KCl 0,1 µS/cm
Glass fiber diaphragm Glass fiber bundle
instead of a ceramic
diaphragm for
electrodes with a
plastic shaft
Polymerized
solid electrolyte
Without salt reserve: 150 µS/cm
With salt reserve: 100 µS/cm
General water or wastewater
engineering (lightly polluted
media)
PTFE ring diaphragm Large surface area ring
diaphragm
Polymerized
solid electrolyte
Without salt reserve: 100 µS/cm
With salt reserve: 50 µS/cm
Only for very heavily polluted media or
adherent media containing oil, for
example
Annular-gap or
perforated diaphragm
Open transition
between the solid
electrolyte and the
medium, implemented
in annular or punctate
form
Polymerized
solid electrolyte
Without salt reserve: 500 µS/cm
With salt reserve: 500 µS/cm
Suspensions, varnishes, media
containing solids,
heavily polluted media;
not suitable for very pure drinking
water or low-ion media
• Data sheet 201005 – JUMO ecoLine/JUMO BlackLine
pH and redox combination electrodes
• Data sheet 201030 – JUMO laboratory pH combination electrodes
• Data sheet 201050 – JUMO ISFET pH combination electrode
• Data sheet 201081 – JUMO glass pH electrodes • Data sheet 201082 – JUMO single/twin redox electrodes
• Data sheet 201083 – JUMO reference electrode • Data sheet 201085 – JUMO compensation thermometer