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HI9812 5
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26 Feb 2019
American Samoa
1 UNIT
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Spesifikasi

PH Meter

Details

The HI9812-5 portable meter features a large LCD which displays either pH, EC, TDS or temperature readings along with tutorial instructions. The HI9812-5 is a simplistic pH/EC/TDS meter that is calibrated manually to a single point with the use of two trimmers. pH is calibrated to pH 7.01 while EC/TDS is calibrated to either 1413 µS/cm or 1382 ppm. The LCD screen has battery life indicator as well as on-screen tutorial messages.

The supplied HI1285-5 probe is a polypropylene body, amplified pH electrode with a built-in EC/TDS and temperature sensors. The amplifier for the pH electrode prevents interference from humidity and electrical noise from common sources including from motors, ballasts or pumps. The HI9812-5 is a versatile meter best suited for agricultural, greenhouse and hydroponic applications.

HI1285-5 polypropylene body amplified pH electrode with built in EC/TDS and temperature sensors

The HI9812-5 is supplied with a polypropylene body pH/EC/TDS/temperature probe. The pH, EC, TDS, and temperature sensors are housed in a single body that connects to the meter with a DIN connector. This probe is specially engineered with a fiber junction and gel electrolyte to produce a fast response with reduced contamination.

Amplified pH electrode

The pH electrode circuit has a built in amplifier that will reduce the effects of electrical noise on the high impedance pH measurement. Examples of sources of electrical noise include motors, ballasts, and pumps which are common in greenhouses.

Amperometric EC/TDS sensor

The EC/TDS readings are performed by an amperometric sensor. An alternating voltage is applied to the sensor and the amount of current that passes between the two stainless steel pins is dependent upon the amount of salts (fertilizer) present. A greater amount of salt present results in an increase in conductance.

Polypropylene body

The polypropylene body houses all the sensors in a single body design and is durable. The probe is gel filled for maintenance free operation. It does not have to be refilled periodically.

  • 3 sensors in a single probe
  • Pre-amplified pH electrode for resistance to electrical noise
  • Gel filled maintenance free pH electrode

Features at-a-glance

  • Water Resistant
  • Automatic Temperature Compensation
    • All readings are compensated for variations in temperature
  • Variable EC to TDS conversion factor
    • Factor automatically adjusts from 0.56 to 0.78 based on actual EC readings
    • Factor based on 442 curve for natural water
  • Low Battery Indicator

Specifications

pH Range0 to 14 pH
pH Resolution0.1 pH
pH Accuracy (@25ºC/77ºF)±0.1 pH
pH Calibrationmanual, one-point
EC Range0.00 to 1990 µS/cm
EC Resolution10 µS/cm
TDS Range0 to 1990 ppm (mg/L)
TDS Resolution10 ppm (mg/L)
EC/TDS Accuracy±2% F.S.
TDS Conversion Factor0.5 ppm (mg/L) = 1 µS/cm
Temperature Range0.0 to 60.0°C
Temperature Resolution0.1°C
Temperature Accuracy (@ 25°C/77°F)±0.5°C
Temperature Compensationautomatic, 0 to 50°C
Temperature Coefficientβ = 2% /°C
ProbeHI1285-5 polypropylene body, pre-amplified multiparameter probe with internal temperature sensor, 8-pin DIN connector and 1m cable
Calibrationmanual, one-point
Battery Type / Life9V / approximately 150 hours of continuous use
Environment0 to 50°C (32 to 122°F); RH max 100%
Dimensions145 x 80 x 36 mm (5.7 x 3.1 x 1.4”)
Weight230 g (8.1 oz.)
Ordering InformationHI9812-5 is supplied with HI1285-5 multiparameter probe, HI70007 pH 7.01 buffer solution sachet, HI70442 1500 ppm calibration solution sachet, HI70031 1413 µS/cm calibration solution sachet, HI700661 electrode cleaning solution sachets (2), 9V battery, instructions and rugged carrying case.
Warranty2 years (probe 6 months)

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