LE Sensor - Affordable and Reliable
Tried and trusted features
- This robust plastic pH electrode is always ready to use and gives fast and precise results
Ergonomic and easy
- Easy-to-use wetting cap with a self-tightening screw lock that guarantees clean and secure electrode storage.
The right sensor for every application
- METTLER TOLEDO offers pH and other sensors for all kinds of applications. Find the sensor best suited for you here: www.mt.com/electrode-guide
Technical Specifications
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Model Name | pH Sensor LE 407 | pH Sensor LE 438 | LE pH Electrode LE438-IP67 |
Product Number | 51340330 | 51340242 | 30247153 |
Measuring range | pH 0 – 14 | pH 0 – 14 | pH 0 – 14 |
Temperature range | 0 °C – 80 °C | 0 °C – 80 °C | 0 °C – 80 °C |
Connector | BNC | BNC/RCA (Cinch) | BNC/RCA (Cinch) IP67 |
Cable and connectors | 1.0 m BNC | 1.0 m BNC/RCA (Cinch) | 2.0 m BNC/RCA (Cinch), IP67 |
Type of junction | Polyester | Polyester | Polyester |
Shaft Material | POM | POM | POM |
Sensor type | Combined electrode | Combined electrode | Combined electrode |
Shaft length | 120 mm | 120 mm | 120 mm |
Shaft Diameter | 12 mm | 12 mm | 12 mm |
Cable | 1 m | 1 m | 2 m |
Parameter | pH | pH | pH |
Reference System | Ag/AgCl | Ag/AgCl | Ag/AgCl |
Reference electrolyte | Gel | Gel | Gel |
Membrane glass | U | U | U |
Membrane resistance (25°C) | < 250 mΩ | < 250 mΩ | < 250 mΩ |
Intelligent Sensor Management (ISM®) | No | No | No |
Temperature probe | No | NTC 30 kΩ | NTC 30 kΩ |
For portable meter | No | No | Yes |
Low Maintenance | Yes | Yes | Yes |
Signal type | Analog | Analog | Analog |
Sample | General purpose; water |
General purpose; water |
General purpose; water |
Base Unit Temperature Range | 0 °C – 80 °C | 0 °C – 80 °C | 0 °C – 80 °C |
Cable included | Yes | Yes | Yes |
Connector on Sensor | Fixed 1 m cable | Fixed 1 m cable | Fixed 2 m cable |
Connector to Meter | BNC | BNC/RCA (Cinch) | BNC/RCA (Cinch) |
Minimum Sample Volume ul | 20 ml | 20 ml | 20 ml |
Sample Composition | Aqueous | Aqueous | Aqueous |
Sample Consistency | Liquid; Sludge/slurry/suspension |
Liquid; Sludge/slurry/suspension |
Liquid; Sludge/slurry/suspension |
Sample temperature | 0°-100°C | 0°-100°C | 0°-100°C |
Sample Volume | >= 20 ml | >= 20 ml | >= 20 ml |
Sensor characteristics | IP67; Mechanically robust |
Temperature probe; Mechanically robust |
Temperature probe; IP67; Mechanically robust |
Typical Samples | Water; Beer, Suspended soil |
Water; Beer, Suspended soil |
Water; Beer, Suspended soil |
Minimum sample volume µl | 20 ml |
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ManufacturerMettler-Toledo GmbH
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Country of OriginChina
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Measuring Range0–14, 0–11
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Temperature Range0 °C – 80 °C, 0 °C – 50 °C
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Typical SamplesGeneral Purpose; Water, Water; Beer, Suspended Soil, General Purpose; High-Ion Strength; Water, Waste Water, Emulsions
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Sample Volume20 ml
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ModelLE407, LE438, LE438-IP67, LE409, LE410, LE420