Rikagaku
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| Brand | Rikagaku |
|---|---|
| Origin | Japan |
| Model | CR-30 |
| Measurement Principle | Platinum-Cobalt Spectrophotometric Method |
| Range | 0.0–50.0 Pt-Co Units |
| Repeatability | ±0.5 Pt-Co Units (at constant temperature) |
| Operating Temperature | 5–35°C |
| Storage Temperature | −10–35°C |
| Protection Rating | IP63 |
| Power Supply | 4 × LR1 (1.5 V) alkaline batteries (DC 6 V) |
| Dimensions | 54 × 38 × 350 mm |
| Weight | ~300 g |
| Sensor Immersion Depth | Fixed reference level |
| Zero Calibration | Deionized or distilled water |
| Span Calibration | Optional Pt-Co standard solution (e.g., 10 Pt-Co units, 250 mL) |
| Display Alerts | BAT (low battery), ERR (error), S (sensor fault), CAL (calibration mode) |
| Over-range Indication | Upper limit value blinking |
| Sample Compatibility | Clear, low-turbidity aqueous samples (e.g., drinking water, swimming pool water) |
| Exclusions | Organic solvents, strong alkalis, hydrofluoric acid |
| Brand | Rikagaku |
|---|---|
| Origin | Japan |
| Model | CL-203N |
| Measurement Principle | Potentiometric ion-selective electrode (ISE) with Ag/AgCl-based chloride-specific sensing membrane |
| Application Domain | On-site and lab-based chloride quantification in fresh concrete mixtures, fine aggregates, wash water, and aqueous extracts per JIS A 1154, ASTM C114, and ISO 9557 |
| Temperature Compensation | Automatic (0–50 °C), NTC thermistor integrated in CLD-11 electrode |
| Display | Dual-line LCD — 4-digit resolution for chloride/salinity (% or kg/m³), 3-digit for temperature (°C) |
| Range | Salinity: 0.001–1.000 % (10–10,000 mg/L Cl⁻) |
| Chloride content | 0.001–1.999 kg/m³ (calculated from salinity × unit water volume W) |
| Electrode potential | −1000 to +1000 mV |
| Temperature | 0–50 °C |
| Resolution | 0.001 % salinity (10 mg/L), 1 mV, 0.1 °C |
| Repeatability | ±2 % of reading (salinity), ±0.5 °C (temperature) |
| Calibration | Two-point using certified NaCl standard solutions (0.01 % and 0.5 % w/v) |
| Memory | 30 measurement records with timestamp and temperature stamp |
| Housing Dimensions | 70 × 40 × 173 mm (W × H × D) |
| Weight | 290 g (main unit), 130 g (CLD-11 electrode with 1 m cable) |
| Compliance | Designed for GLP-aligned field testing |