BRAND NEW HANNA HI 98121 COMBINATION pH ORP TESTER
Oxygen Reduction Potential and PH and temp meter. A must for water management on koi ponds.
An ORP meter measures the Oxidation or Reduction Potential of the water. This is a direct measure of pollution index of the water, since more pollution gives a lower ORP reading.
Therefore, the higher the ORP level, the less polluted the pond; the lower the ORP level, the more polluted the pond. A low ORP can indicate low dissolved oxygen, high nitrites, or high DOC (Dissolved Organic Carbon), with the DOC promoting the increase of harmful bacteria….A pond with an ORP value below 200 mV will promote growth of slime algae, between 200 and 250 will promote blanket weed or stringy algae, above 250 algae growth will be prevented……As ORP increases, the rate of healing of ulcers increases and at high levels ulcers can be prevented..
A reading of >300mv is ideal…
The newest member to HANNA® Combo series of combination waterproof testers with advanced functions is HI 98121, designed for simultaneous pH and ORP measurements.
HI 98121 also reads temperature, which is continuously displayed on the dual level LCD.
An encapsulated external stainless steel sensor, positioned in close proximity to the pH electrode provides fast response. A fiber junction can be easily pulled out and replenished. And when finally spent, the pH electrode cartridge can be quickly replaced with the supplied electrode removal tool, reducing waste and cost.
HI 98121 works with common batteries and when turned on, displays the percentage of remaining battery life. The stability indicator ensures reliable readings.
Ergonomically designed for ease in handling, this meter will float if inadvertently dropped into water.
SPECIFICATION
| Range | mV | ±1000 mV |
| Range | pH | -2.00 to 16.00 pH |
| Range | Temperature | -5.0 to 60.0°C / 23.0 to 140.0°F |
| Resolution | mV | 1 mV |
| Resolution | pH | 0.01 pH |
| Resolution | Temperature | 0.1°C / 0.1°F |
| Accuracy | mV | ±2 mV |
| Accuracy | pH | ±0.05 pH |
| Accuracy | Temperature | ±0.5°C / ±1°F |
| Calibration | mV | factory calibrated |
| Calibration | pH | automatic, at 1 or 2 points with 2 sets of memorized buffers
(pH 4.01 / 7.01 / 10.01 or pH 4.01 / 6.86 / 9.18) |
| Temperature Compensation | | Automatic for pH readings |
| Electrode | | HI 73127 replaceable pH electrode (included); fixed ORP sensor |
| Battery Type / Life | | 4 x 1.5V with BEPS / approx. 250 hours of continuous use;
auto-off after 8 minutes of non-use |
| Environment | | -5 to 50°C (23 to 122°F); RH max 100% |
| Dimensions | | 163 x 40 x 26 mm (6.4 x 1.6 x 1.0") |
| Weight | | 100 g (3.5 oz.) |
HI 98121 is supplied with protective cap, electrode removal tool, batteries and instructions.
