GS5-E ORP Electrode for GroStar Pocket Testers
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The GroStar™ GS5-E ORP Electrode is compatible with the GroStar™ GS1, GroStar™ GS2 and GroStar™ GS4. When the electrode is connected, the instrument recognizes the electrode and automatically switches to ORP measurement mode, in which the redox potential (ORP) of liquids, such as nutrient solutions, can be measured.
- Allows the measurement of the redox potential (ORP) of nutrient solutions and other liquids with GroStar™ pH Pen Testers.
- Equipped with platinum sensor and double-junction.
- Can be attached quickly and easily without additional tools, the device automatically switches to ORP measurement mode.
- Compatible with Pocket Testers GS1, GS2 and GS4 from the GroStar™ series.
Technical Specifications:
| ORP | Measuring range | -1000 to 1000 mV |
| Diaphragm | Double-junction | |
| Sensor type | Platinum | |
| Reference electrode | Ag/AgCl | |
| Electrolyte | Gel KCl | |
| Temperature | Measuring range | 0 to 50°C (32 to 122°F) |
| Temperature sensor | 30KΩ thermistor | |
| More | Housing | Polycarbonate |
| Dimensions | 75×35×35 mm |
This electrode has a 12-month manufacturer's warranty.
| (-) Technical data: | |
|---|---|
| Product type description: | ORP-Elektrode |
| Reg. Trademark: | GroStar® |
| Diameter: | 35 mm |
| Length: | 75 mm |
| Shaft material: | Plastic |
| Reference electrolyte: | Gel |
| Type of thermocouple: | NTC |
| Integrated thermometer: | Yes |
| Temperaturesensor type: | NTC |
| (-) Compliance information: | |
|---|---|
| WEEE obligation: | Yes |
| WEEE registration number: | DE 28154958 |
| WEEE brand according to EAR register: | APERA Instruments (Europe) GmbH |
| WEEE type of equipment: | Small equipment, that can be used in private households |
- Article-No: 28APE190386
- Category: electrodes
Show all electrodes from APERA Instruments - Index: conductivity sensors, Oxygen probes
- Validity: 30.09.2026
- Last Update: 30.09.2025
Accessory of:
- 28APE190349
GroStar™ GS1 pH Pocket Tester - 28APE190350
GroStar™ GS2 pH Pocket Meter for Soil Samples - 28APE190352
GroStar™ GS4 pH/EC Pocket Tester



