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เครื่องวัดคุณภาพน้ำ pH/EC/TDS Hanna Grochek Combo Monitor HI 991404 pH EC TDS Meter – gro chek hydroponics (pre-order) from USA
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At startup, these indicators perform a self-check to assure proper working condition. HI 991404 stability indicator and hold features prompt the user when to take the reading and freezes the display for easy and accurate recording.
Calibration and temperature compensation is automatic, while the EC/TDS conversion factor and temperature coefficient (ß) are user adjustable for application-specific measurements.
These instruments are supplied with an advanced, non-clogging double junction pH electrode and a rugged conductivity probe that will withstand even the most aggressive environments. The instruments are powered by a 12 volt dc transformer and are easy to install and use.
Hanna HI 991404 pH/EC/TDS/Temperature Monitors
- Non-clogging double junction pH electrode for prolonging meter life
- Automatic calibration and temperature compensation for ease of use
- Self-check and stability indicator to indicate when to take a reading
- Large LCD screen for readability
- 12 Vdc power adapter for prolonged use
| Range | pH | 0.0 to 14.0 pH |
| EC | 0 to 3999 µS/cm | |
| TDS | 0 to 2000 mg/L (ppm) | |
| Temperature | 0.0 to 60.0°C / 32.0 to 122.0°F | |
| Resolution | pH | 0.1 pH |
| EC | 1 µS/cm | |
| TDS | 1 mg/L (ppm) | |
| Temperature | 0.1°C (0.1°F) | |
| Accuracy @ 20°C | pH | ±0.1 pH |
| EC/TDS | ±2% F.S. | |
| Temperature | ±0.5°C (±1°F) | |
| Temperature Compensation |
pH | automatic |
| EC/TDS | automatic with ß adjustable from 0.0 to 2.4%/°C | |
| Calibration | pH | automatic, one or two points with auto-buffer recognition |
| EC/TDS | automatic, one point at 1413 µS/cm or 1382 ppm | |
| TDS Factor | adjustable from 0.45 to 1.00 | |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% non-condensing | |
| Input Impedance | 1012 Ohm | |
| Power Supply | 12 VDC adapter (included) | |
| Dimensions/Weight | 160 x 105 x 31 mm (6.3 x 4.1 x 1.2) / 190 g (6.7 oz.) | |
| Probes | pH | HI 1293D PEI body, pre-amplified pH electrode with 1/2” NPT pipe thread, DIN connector and 2 m (6.6’) cable (included); |
| EC/TDS | HI 7630 conductivity probe with 1/2” NPT pipe thread and 2 m (6.6’) cable(fixed) |
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