GreenPrima Bsen s140T Pure-Water pH Sensor
| Brand | GreenPrima |
|---|---|
| Origin | Switzerland |
| Manufacturer Type | Manufacturer |
| Origin Category | Imported |
| Model | Bsen s140T |
| Price Range | USD 1,400 – 4,200 |
| Measurement Range | 0–14 pH |
| Operating Temperature | −5 to 100 °C |
| Reference Electrode | Ag/AgCl Cartridge |
| Temperature Sensor | PT1000 |
| Max. Pressure | 6 bar |
| Electrode Body Material | Glass |
| Electrolyte | Gel-Filled |
| Junction | Triple Ceramic Porous Junction |
| Glass Membrane | S-Glass |
| Minimum Immersion Depth | 20 mm |
| Zero Point | ±20 mV |
| Sensitivity | 57–59 mV/pH at 25 °C |
| Minimum Sample Conductivity | 0.1 µS/cm |
| Response Time (pH 4–7) | <30 s |
| Process Connection | PG13.5 |
| Cable Length | 5 m |
Overview
The GreenPrima Bsen s140T is a high-precision, gel-filled, pure-water pH sensor engineered for continuous in-line monitoring of ultrapure water (UPW), deionized water (DI), reverse osmosis (RO) permeate, and low-conductivity boiler feedwater systems. Unlike conventional pH electrodes optimized for municipal or process wastewater, the Bsen s140T employs a proprietary S-glass membrane formulation with enhanced hydrophilicity and reduced alkali error—critical for stable, drift-free measurements below 1 µS/cm conductivity. Its triple ceramic junction design ensures consistent electrolyte outflow under low-pressure, low-ionic-strength conditions while minimizing clogging and liquid junction potential instability. The integrated PT1000 temperature sensor enables automatic, NIST-traceable temperature compensation per ISO 7027 and ASTM D1293, supporting accurate pH calculation across dynamic thermal environments from −5 °C to 100 °C. Designed for direct integration with the GreenPrima PM8200P pH/ORP controller, the sensor operates within a robust architecture compliant with IEC 61000-6-2 (EMC immunity) and IP66-rated enclosures for industrial deployment.
Key Features
- S-glass pH-sensitive membrane with low sodium error and extended service life in sub-1 µS/cm applications
- Gel-filled Ag/AgCl reference system with replaceable cartridge—eliminates liquid refill maintenance and leakage risk
- Triple ceramic junction providing balanced electrolyte diffusion and long-term stability in low-conductivity media
- Integrated PT1000 platinum resistance thermometer (±0.1 °C accuracy) for real-time, linear temperature compensation
- PG13.5 threaded process connection compatible with standard sanitary and industrial fittings (e.g., Tri-Clamp adaptors)
- 5-meter shielded, low-noise cable with integral grounding braid—optimized for noise rejection in electrically noisy plant environments
- Maximum operating pressure rating of 6 bar (87 psi), suitable for pressurized RO skids and UPW distribution loops
Sample Compatibility & Compliance
The Bsen s140T is validated for use in water matrices with conductivity as low as 0.1 µS/cm, including semiconductor-grade ultrapure water (ASTM D5127 Class I), pharmaceutical purified water (USP ), and power generation condensate. It complies with key regulatory frameworks governing analytical instrumentation in regulated industries: FDA 21 CFR Part 11 (when paired with PM8200P’s audit-trail-enabled firmware), EU Annex 11 (data integrity requirements), and ISO/IEC 17025 calibration traceability protocols. The sensor’s glass body and gel electrolyte meet RoHS Directive 2011/65/EU and REACH SVHC criteria. No mercury or thallium compounds are used in construction. Calibration verification may be performed using NIST-traceable buffer solutions (e.g., pH 4.01, 7.00, 10.01 at 25 °C) per ISO 17511.
Software & Data Management
When connected to the GreenPrima PM8200P controller, the Bsen s140T supports dual 4–20 mA analog outputs (pH and temperature), Modbus RTU over RS485, and configurable relay logic for proportional dosing control (e.g., acid/base addition). The controller firmware provides GLP-compliant data logging—including timestamped calibration events, slope/offset diagnostics, and sensor health indicators—with optional SD card storage (up to 1 million records). All configuration changes are recorded with user ID and audit trail, satisfying FDA 21 CFR Part 11 electronic record requirements when deployed with role-based access control and digital signature capability. Data export is supported via CSV over USB or Ethernet.
Applications
- Real-time pH monitoring in semiconductor fab UPW distribution networks
- Boiler feedwater and condensate return loop control in thermal power plants
- Final rinse water quality assurance in medical device sterilization tunnels
- Pharmaceutical water-for-injection (WFI) and purified water (PW) system validation
- Monitoring of electro-deionization (EDI) module effluent in high-purity water generation
- Research-grade aqueous chemistry experiments requiring sub-mV baseline stability
FAQ
What is the minimum water conductivity this sensor can reliably measure?
The Bsen s140T is validated for stable operation down to 0.1 µS/cm—making it suitable for ultrapure water applications where conventional electrodes exhibit excessive drift or erratic response.
Can the reference cartridge be replaced in the field without sending the sensor for service?
Yes—the Ag/AgCl reference cartridge is user-replaceable using standard torque tools; replacement kits (P/N REF-CART-B140) are available with full calibration certificate.
Is temperature compensation automatic and traceable?
Yes—integrated PT1000 provides continuous, linear compensation per DIN EN 60751 Class A; temperature readings are NIST-traceable and logged alongside pH values.
Does the sensor require periodic refilling or gel replenishment?
No—the gel electrolyte is sealed and maintenance-free for the rated service life (typically ≥18 months in continuous UPW service).
How is sensor performance verified during qualification?
GreenPrima provides factory calibration reports per ISO/IEC 17025, including slope (mV/pH), asymmetry potential, and response time; users may perform on-site verification using certified buffers and documented SOPs.
