- Autoranging, manual ranging and range lock
- Four ring probe design
- Automatic, manual and no Temperature Compensation
- Auto endpoint; Automatically freezes stable readings on the LCD display
- GLP features
- BEPS; (Battery Error Prevention System) alerts the user in the event that low battery power could adversely affect readings
- On-screen user guides
- Backlit display
- % Battery displayed on startup
HI 9835 is handheld conductivity/TDS/salinity/temperature meters. Users are provided with a series of diagnostic features and messages on the LCD which guide the user through calibration, operation and troubleshooting.
Conductivity and TDS measurement parameters are selectable such as: cell constant range from 0.500 to 1.700, temperature coefficient from 0.00 to 6.00%/ºC, temperature reference from 20 to 25ºC and a selectable TDS factor of 0.40 to 0.80.
This instrument utilizes the four ring HI 76309/1.5 conductivity probe with internal temperature sensor. The four ring design offers accurate readings over all the conductivity range with immunity to polarization and falling that occurs on long term use of amperometric probes.
The autoranging feature of the EC and TDS modes automatically sets the meter to the scale with the highest possible resolution. The auto endpoint feature automatically freezes the display once a stable reading is reached.
Spesification :
| Range | EC | 0.00 to 29.99 µS/cm; 30.0 to 299.9 µS/cm; 300 to 2999 µS/cm; 3.00 to 29.99 mS/cm; 30.0 to 200.0 mS/cm; up to 500.0 mS/cm (actual EC)* |
| TDS | 0.00 to 14.99 mg/L (ppm); 15.0 to 149.9 mg/L (ppm); 150 to 1499 mg/L (ppm); 1.50 to 14.99 g/L (ppt); 15.0 to 100.0 g/L (ppt); up to 400.0 g/L (ppt) (actual TDS)* with 0.80 conversion factor | |
| NaCl | 0.0 to 400.0% | |
| Temperature | –20.0 to 120.0 ºC (-4.0 to 248.0ºF) | |
| Resolution | EC | 0.01 µS/cm; 0.1 µS/cm; 1 µS/cm; 0.01 mS/cm; 0.1 mS/cm |
| TDS | 0.01 mg/L (ppm); 0.1 mg/L (ppm); 1 mg/L (ppm); 0.01 g/L (ppt); 0.1 g/L (ppt) | |
| NaCl | 0.1% | |
| Temperature | 0.1°C | |
| Accuracy @ 25°C | EC | ±1 % of reading (±0.05 µS/cm or 1 digit) |
| TDS | ±1 % of reading (±0.03 mg/L (ppm) or 1 digit, whichever greater) | |
| NaCl | ±1% of reading | |
| Temperature | ±0.2°C (excluding probe error) | |
| Calibration | EC | automatic, one point with six memorized values (84, 1413, 5000, 12880, 80000, 111800 µS/cm) |
| NaCl | one point with HI 7037 calibration solution | |
| Temperature | two point, at 0 and 50°C (32 and 122°F) | |
| Temperature Compensation |
automatic or manual from –20.0 to 120.0 ºC (-4.0 to 248.0ºF) (can be disabled for measuring conductivity) | |
| Temperature Coefficient |
selectable from 0.00 to 6.00%/ºC (EC and TDS only); default value is 1.90%/ºC | |
| TDS Factor | selectable from 0.40 to 0.80 (default value is 0.50) | |
| Probe | HI 76309 four ring conductivity probe with internal temperature sensor, DIN connector and 1 m (3.3’) cable (included) | |
| Power Supply | 1.5V AAA batteries (3) /approximately 200 hours of continuous use without backlight (50 hours with backlight on); auto-off after 5, 10, 20 and 60 minutes (can be disabled) | |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% | |
| Dimensions | 185 x 72 x 36 mm (7.3 x 2.8 x 1.4”) | |
| Weight | 300 g (10.6 oz) |