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| Brand | HORIBA |
|---|---|
| Origin | USA |
| Model | D-50 |
| Measurement Parameters | pH, Temperature, ORP, Conductivity (D-54), Dissolved Oxygen (D-55), Ion Selective Electrode (ISE) capability (D-53) |
| Enclosure Rating | IP67 |
| Power Supply | DC 3 V (LR6 batteries) |
| Weight | 300–330 g |
| Interface | RS-232C for PC/printer connectivity |
| Display | Backlit LCD with dual-channel readout |
| Data Logging | Automatic storage with timestamp |
| Self-Diagnostic Function | Yes |
| Electrode Compatibility | Ruggedized waterproof pH/ORP probes, interchangeable sensor modules |
| Brand | Geonica |
|---|---|
| Origin | Spain |
| Model | AquAlert |
| Communication Interfaces | RS485 (Modbus RTU), Ethernet, Cellular (via WebTrans Ubiquiti), Optional 4G/LTE |
| Data Logger | HydroData-3000 (32 MB non-volatile flash memory) |
| Software Platform | GeoNiCa Suite-4K (Windows-based), DataGraph-W4K, WebTrans Ubiquiti2 (Linux web application) |
| Sensor Capacity | Configurable modular rack supporting 4–12 smart sensors |
| Auto-Cleaning Modes | Reagent-assisted recirculation cleaning, deionized water rinse, compressed air purge |
| Environmental Rating | IP68 submersible sensor housings |
| operating temperature | −20 °C to +50 °C |
| Compliance | Designed for ASTM D1129, ISO 5667-3, ISO 7027, EN 27027, US EPA Method 180.1 (pH), Method 120.1 (conductivity), and GLP/GMP-aligned data integrity workflows |
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