Glass Body Bulb Electrode – FLS pH/ORP 400
The FLS 400 series pH/ORP electrodes with a durable glass body are engineered to meet the demands of a wide range of applications with reliability and precision. Featuring a high-quality ceramic junction, they ensure excellent performance under varying pressure and temperature conditions. To suit diverse requirements, the electrodes are available with different ceramic junction types: annular for faster response time and 3-diaphragm for higher pressure resistance. A standard double junction design effectively prevents contamination of the reference solution, thereby extending service life and ensuring consistent accuracy. Options include models with a long 9-meter cable or head connection (S7), offering installation flexibility. These electrodes deliver dependable, long-term operation, making them ideal for industrial and process applications.
Glass Body Bulb Electrode – FLS pH/ORP 400
Key Features Of Glass Body Bulb Electrode – FLS pH/ORP 400
- Glass body
- Sensors suitable for extreme applications
- Installation easy and cheap
- Cheap adaptors for installations
- Special versions available on request
- High performance electrodes

Technical Details of Glass Body Bulb Electrode – FLS pH/ORP 400
Specification | Details |
---|---|
Operating range: pH electrodes | 0 – 14 pH (0 – 12.3 pH without Na+ error) |
ORP electrodes | ± 2000 mV |
Pipe size range | DN15 to DN100 (0.5” to 4”) |
Zero point voltage point new electrode performances | 7pH ± 0.2pH |
Efficiency new electrode performances | > 97% @ 25°C (77°F) |
Response time new electrode performances: pH | 2 sec for 95% of signal change |
Response time new electrode performances: ORP | Application dependent |
Reference | Electrolyte: 3M KCl polymeric gel (different substrates in according with model) |
Process connection | In-line installation with: PG13,5 (PH435CD); threaded nipple 1/2” (PH431CD; ORP431CD) |
Max working pressure/working temperature (PH435CD) | 6 bar (90psi) @ 130°C (266°F); 16 bar (240psi) @ 25°C (77°F) |
Max working pressure/working temperature (PH431CD) | 2 bar (30psi) @ 100°C (212°F); 10 bar (100psi) @ 25°C (77°F) |
Max working pressure/working temperature (ORP431CD) | 2 bar (30psi) @ 100°C (212°F); 10 bar (100psi) @ 25°C (77°F) |
Wetted materials: body | Glass |
Wetted materials: junction | Anular ceramic (PH431CD; ORP431CD); double anular ceramic (PH435CD) |
Wetted materials: sensing surface | Glass membrane (pH); platinum (ORP) |
Standards & Approvals | Manufactured under ISO 9001; Manufactured under ISO 14001; CE; EAC |

Part No. | Description / Name | Applications / Operative Range | Cable (sold separately) | Connection | Installation | Weight (gr.) |
---|---|---|---|---|---|---|
For pH4XX Bulb pH Electrodes with glass body | ||||||
PH431CD | Double Junction combination pH/Reference electrode | 0 - 13 pH (0 - 12.3 pH without Na⁺ error) | Not required | 9 mt (27 ft) | GEG135 | 200 |
PH435CD | Double Junction combination pH/Reference electrode | For high temperature / 0 - 14 pH (0 - 12.3 pH without Na⁺ error) | CE5S7 | S7 | GEG135, GEG135SE, GEG135FS, GEG135FL | 200 |
ORP4XX Bulb ORP Electrodes with glass body | ||||||
ORP431CD | Double Junction combination ORP/Reference electrode | ± 2000 mV | Not required | 9 mt (27 ft) cable | GEG135 | 200 |
A – PH431CD, ORP431CD
B – PH435CD
1 – Cable: 9mt
2 – Glass body
3 – pH glass bulb
4 – S7
Glass Body Bulb Electrode – FLS pH/ORP 400
Technical Specifications of Glass Body Bulb Electrode – FLS pH/ORP 400

Custom Product Manufacturing Available
If you are searching for customized product designs that meet your requirements, don’t worry. Petron Thermoplast also offers custom product manufacturing services to meet the unique needs of various industries. Work with our expert engineers to create custom designs suited for your application.