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| Brand | OHAUS |
|---|---|
| Origin | USA |
| Model | Starter 300 |
| pH Range | 0.00–14.00 |
| mV Range | −1999 to +1999 mV |
| Temperature Range | 0.0–100.0 °C |
| Resolution | 0.01 pH / 1 mV / 0.1 °C |
| Accuracy | ±0.01 pH / ±1 mV / ±0.5 °C |
| Calibration | Up to 3-point with user-defined buffer sets |
| Temperature Compensation | Automatic or manual (NTC 3 kΩ) |
| Input Impedance | >5 × 10¹² Ω |
| IP Rating | IP54 |
| Display | Backlit LCD |
| Power | 9 V DC adapter (AC 220 V/50 Hz input) |
| Dimensions | 160 × 200 × 65 mm |
| Weight | 0.65 kg |
| Housing Material | ABS |
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Instrument Type | Benchtop |
| Model | FE20 |
| pH Range | 0.00–14.00 |
| pH Resolution | 0.01 |
| Relative pH Accuracy | ±0.01 |
| mV/ORP Range | −1999 to +1999 mV |
| mV Resolution | 1 mV |
| Relative mV Accuracy | ±1 mV |
| Temperature Range | 0.0–100.0 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.5 °C |
| Calibration | Up to 3-point, with 4 pre-defined buffer sets |
| Display | LCD |
| Power Supply | External AC adapter |
| Brand | Hanna Instruments |
|---|---|
| Origin | Italy |
| Model | HI98129 / HI98130 |
| pH Range | 0.00–14.00 pH |
| EC Range | 0–3999 µS/cm (HI98129) / 0.00–20.00 mS/cm (HI98130) |
| TDS Range | 0–2000 ppm (HI98129) / 0.00–10.00 ppt (HI98130) |
| Temperature Range | 0.0–60.0°C |
| pH Resolution | 0.01 pH |
| EC Resolution | 1 µS/cm (HI98129) / 0.01 mS/cm (HI98130) |
| TDS Resolution | 1 ppm (HI98129) / 0.01 ppt (HI98130) |
| Temp Resolution | 0.1°C / 0.1°F |
| pH Accuracy | ±0.05 pH |
| EC/TDS Accuracy | ±2% F.S. |
| Temp Accuracy | ±0.5°C |
| Calibration | Auto 1-/2-point pH |
| ATC | 0.0–60.0°C |
| Power | 4 × 1.5 V AAA batteries |
| IP Rating | IP67 |
| Dimensions | 163 × 40 × 26 mm |
| Weight | 100 g |
| Brand | Hanna Instruments |
|---|---|
| Origin | Italy |
| Model | HI98127 / HI98128 |
| pH Range | -2.0 to 16.0 pH (HI98127), -2.00 to 16.00 pH (HI98128) |
| Temperature Range | -5.0 to 60.0°C / 23.0 to 140.0°F |
| pH Resolution | 0.1 pH (HI98127), 0.01 pH (HI98128) |
| Temperature Resolution | 0.1°C / 0.1°F |
| pH Accuracy | ±0.1 pH (HI98127), ±0.05 pH (HI98128) |
| Temperature Accuracy | ±0.5°C / ±1°F |
| Calibration | Automatic 1- or 2-point with memory for two calibration sets (pH 4.01/7.01/10.01 or pH 4.01/6.86/9.18) |
| Temperature Compensation | Automatic (ATC) |
| Power | 4 × 1.5 V AAA batteries |
| Operating Environment | -5 to 50°C, up to 100% RH |
| Dimensions & Weight | 163 × 40 × 26 mm, 100 g |
| Brand | OHAUS |
|---|---|
| Origin | USA |
| Model | STARTER 2100/3C Pro |
| pH Range | 0.00–14.00 |
| mV Range | −1999 to +1999 mV |
| Temperature Range | 0.0–100.0 °C |
| Resolution | 0.01 pH / 1 mV / 0.1 °C |
| Accuracy | ±0.01 pH / ±1 mV / ±0.5 °C |
| Calibration | Up to 3-point with auto-buffer recognition |
| Temperature Compensation | Automatic or manual (NTC 30 kΩ sensor) |
| Input Impedance | >10¹² Ω (BNC pH input) |
| Power | AC 110–240 V, 50 Hz / DC 12 V |
| Dimensions | 220 × 175 × 78 mm |
| Weight | 0.75 kg |
| Display | LCD |
| Housing Material | ABS |
| Compliance | CE, ISO 9001, CMC certified |
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Model | S20 |
| pH Range | 0.00–14.00 |
| pH Resolution | 0.01 |
| Relative pH Accuracy | ±0.01 |
| mV Range | −1999 to +1999 mV |
| mV Resolution | 1 mV |
| Relative mV Accuracy | ±0.4 |
| Temperature Range | −5.0 to 105.0 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.5 °C |
| Display | LCD |
| Power Supply | External AC adapter or 4× AA (LR6) batteries |
| Calibration | Auto-buffer recognition, user-definable buffer sets, ATC, auto-endpoint hold |
| Brand | MYRON L |
|---|---|
| Origin | USA |
| Model | Ultrameter 6P |
| Instrument Type | Portable |
| Parameter Count | 6 |
| Measurement Accuracy | ±0.01 pH |
| pH Range | 0–14 |
| pH Resolution | 0.01 |
| pH Accuracy | ±0.01 pH |
| Calibration Solution | pH 7 buffer |
| Conductivity Range | Auto-ranging 0–9999 µS/cm, 10–200 mS/cm |
| TDS Range | 0–9999 ppm, 10–200 ppt |
| Resistivity Range | 10 kΩ·cm – 30 MΩ·cm |
| ORP Range | ±999 mV |
| Temperature Range | 0–71 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.1 °C |
| Auto Temperature Compensation | Yes (0–71 °C) |
| IP Rating | IP67 (NEMA 6) |
| Data Storage | 20 points with timestamp |
| Enclosure | Fully sealed, buoyant, submersible to 1 m |
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Model | FG2 |
| Instrument Type | Portable |
| pH Range | 0.00–14.00 |
| pH Resolution | 0.01 |
| pH Accuracy (relative) | ±0.01 |
| mV Range | −1999 to +1999 mV |
| mV Resolution | 1 mV |
| mV Accuracy (relative) | ±1 |
| Temperature Range | 0.0–100.0 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.5 °C |
| Calibration | Up to 3-point, with 4 predefined buffer sets |
| Data Storage | 30 measurements |
| Display | LCD |
| Power Supply | 4 × AAA 1.5 V batteries |
| IP Rating | IP54 |
| Operating Environment | 0–40 °C, 5–80 % RH |
| Brand | Hanna Instruments |
|---|---|
| Origin | Italy |
| Model | HI98107 |
| pH Range | 0.0 to 14.0 |
| Resolution | 0.1 pH |
| Accuracy | ±0.1 pH |
| Calibration | Manual 2-point |
| Electrode | HI73106 replaceable pH electrode |
| Power | 4 × 1.5 V AAA batteries |
| Operating Environment | 0 to 50 °C, ≤95% RH |
| Dimensions | 175 × 41 × 23 mm |
| Weight | 95 g |
| Brand | METTLER TOLEDO |
|---|---|
| Origin | Switzerland |
| Model | SG2 |
| pH Range | 0.00–14.00 |
| pH Resolution | 0.01 |
| pH Accuracy (relative) | ±0.01 |
| mV Range | −1999 to +1999 mV |
| mV Resolution | 1 mV |
| mV Accuracy (relative) | ±1 |
| Temperature Range | −5.0 to 105.0 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Accuracy | ±0.5 °C |
| Display | Custom LCD |
| IP Rating | IP67 |
| Data Storage | 30 measurements |
| Calibration | Up to 3-point, with predefined or user-defined buffer sets (DIN, NIST, US, TECH) |
| Connectivity | IR interface (RS232/USB via optional adapter) |
| Operating Environment | 5–40 °C, 5–80% RH (non-condensing) |
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