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| Brand | Rikori |
|---|---|
| Origin | Japan |
| Model | H2SO4-55 |
| Instrument Type | Portable/Handheld Water Quality Analyzer |
| Measurement Parameter | Sulfuric Acid Concentration |
| Range | 0.0–199.9 g/L |
| Resolution | 0.1 g/L |
| Repeatability | ±5% FS |
| Reproducibility | ≤5% |
| Response Time | 5 s after power-on |
| Measurement Time | ~60 s per sample |
| Auto-Power-Off | 5 s after measurement hold |
| Calibration | Zero and span calibration required prior to use |
| Light Source | LED |
| Power Supply | 4× AAA alkaline batteries (LR03), DC 6 V |
| Dimensions | 88 × 174 × 65 mm (W×D×H) |
| Weight | ~310 g |
| Standard Accessories | Instrument body, 4× AAA batteries, three cuvettes, H2SO4-RA reagent (500 mL), span calibration cuvette (1×), 5-mL dropper, 0.1-mL micropipette, instruction manual, warranty card, carrying case |
| Brand | Rikorika |
|---|---|
| Origin | Japan |
| Model | SSTR-5Z |
| Instrument Type | Portable/HANDHELD Water Quality Analyzer |
| Measured Parameters | Turbidity (NTU), Suspended Solids (SS, mg/L) |
| Measurement Principle | Near-Infrared 90° Scattered Light Detection |
| Light Source | LED with Auto-Brightness Compensation |
| Detection Method | Ratio-metric dual-beam (sample + reference channel) |
| Display | 4-digit LCD |
| Turbidity Range | 0–500 NTU |
| SS Range | 0–500 mg/L (extendable to 1000 mg/L via range switching) |
| Resolution | 0.1 NTU/mg/L (0–199.9), 1 NTU/mg/L (200–500), 0.01 NTU/mg/L (full scale 1000) |
| Repeatability | ≤ ±2% FS (under specified conditions) |
| Zero Calibration | Deionized water or dedicated zero calibration plate |
| Span Calibration | Hydrazine-based turbidity standard (Formazin) or direct SS calibration using lab-analyzed sample |
| SS Conversion Function | Linear regression y = a + bx (user-configurable coefficients) |
| Operating Temperature | 0–40°C |
| Sample Temp. Range | 5–40°C |
| Immersion Materials | PVC, Borosilicate Glass, SUS-304 Stainless Steel |
| Probe Dimensions | Ø53 × 270 mm |
| Cable Length | 6 m |
| Weight | ~500 g (probe only, excluding cable) |
| Power Supply | 3 × AAA alkaline (LR03), auto-power-off enabled |
| Self-Diagnostic Functions | Battery voltage monitoring, calibration error detection, photodetector fault alert |
| IP Rating | IP67 (probe body) |
| Brand | Rikorika |
|---|---|
| Origin | Japan |
| Model | TCR-5Z |
| Instrument Type | Portable/HANDHELD Water Quality Analyzer |
| Measurement Parameters | Turbidity, Color (Platinum-Cobalt Scale), Absorbance |
| Measurement Principle | Dual-beam Transmittance Photometry (Spectrophotometric Method) |
| Range | Turbidity 0.0–50.0 NTU (Polystyrene Standard), Color 0.0–50.0° (Pt-Co Scale), Absorbance 0.000–1.999 Abs |
| Resolution | 0.1° (0.01° selectable below 10°), 0.001 Abs |
| Repeatability | ±0.5° under specified conditions |
| IP Rating | IP66 (when probe connector is properly mated) |
| Power | 3× AAA alkaline batteries (DC 4.5 V) |
| Operating Temperature | 5–35 °C |
| Dimensions (Main Unit) | 38 × 75 × 180 mm |
| Weight (Main Unit) | ~270 g |
| (Probe TCR-5ZD) | ~350 g (excl. cable) |
| Cable Length | 2 m |
| Brand | Kokuritsu |
|---|---|
| Origin | Japan |
| Model | WAS-E / WAS-D1 / WAS-D2 / WAS-G1 / WAS-G2 |
| Instrument Type | Portable, Handheld Water Quality Analyzer |
| Measurable Parameters | pH (2.0–12.0), Conductivity (indirect via TDS/hardness), Total Hardness (0–500 mg/L as CaCO₃), Dissolved Oxygen (1–10 mg/L), COD (0–100 mg/L), NH₃-N (0.2–10 mg/L), NO₂⁻-N (0.006–1 mg/L), NO₃⁻-N (0.23–45 mg/L), PO₄³⁻ (0.05–10 mg/L), S²⁻/H₂S (0.1–5 mg/L), Cr⁶⁺ (0.05–2 mg/L), Cu (0.5–10 mg/L), Zn (0–10 mg/L), Fe (0.05–10 mg/L), Free Chlorine (0.1–5 mg/L), Free Cyanide (0.02–2 mg/L), Turbidity (1–5 NTU per JIS), Color (2–10 Hazen units per JIS), Temperature (0–50 °C), Transparency (0–30 cm), KMnO₄ Consumption (0–15 mg/L), E. coli & Total Bacterial Count (qualitative presence/absence ≥1 CFU/mL) |
| Compliance | JIS K 0102, JIS K 0109, JIS K 0117, JIS K 0120, JIS K 0121 |
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