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Marine Monitor HI981520 - Hanna

Marine Monitor HI981520 - Hanna

Regular price $549.95
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Monitoring the salinity, pH and temperature of the water is an important routine in the maintenance of a marine aquarium or marine aquaculture. The Hann HI981520 is an easy-to-use monitor that continuously monitors and displays salinity (via electrical conductivity, “EC”) and pH.

The system can be calibrated at one or two points for pH and at one point for conductivity. Seawater salinity is displayed in either parts per thousand (ppt), practical salinity units (PSU), or specific gravity (SG).

A high/low alarm can be configured for each parameter. Measurement results are continuously displayed on a large, easy-to-read LCD. The permanently attached 2-ring conductivity probe features an integrated temperature sensor for fast, highly accurate temperature measurements. The HI1286 gel-filled pH electrode features a PEI body that is easy to clean and resistant to many harsh chemicals. In addition, the double diaphragm design is less prone to clogging and ensures fast and stable readings. The pH electrode is replaceable.


  • Two alarm modes of operation (high/low) for each supported parameter
  • High/low alarm (triggered when the reading goes above or below the configured high/low value for the respective parameter)
  • Acoustic alarm signal
  • All readings are temperature compensated
  • The temperature is displayed in °C or °F along with the pH and EC readings
  • The EC probe contains an integrated temperature sensor
  • Easy to read LCD


pH measuring range*

  • Cord Length from Monitor to Probes is 2m (6.56 feet)
  • pH 0.0 to 14.0
  • Resolution pH 0.1
  • Accuracy pH ±0.2
  • Calibration Manual or automatic two-point calibration at pH 7.01 and 10.01
  • ppt measurement range 0.0 to 70.0 ppt (g/L)
  • Resolution 0.1 ppt (g/L)
  • Accuracy ±1.0 ppt between 0.0 ppt and 40.0 ppt ±2.0 ppt between 40.0 ppt and 70.0 ppt
  • Calibration Automatically at a point at 35.00 ppt
  • PSU measurement range 0.0 to 70.0 PSU
  • Resolution 0.1 PSU
  • Accuracy ±1.0 between 0.0 PSU and 40.0 PSU
  • ±2.0 between 40.0PSU and 70.0PSU

Temperature measuring range

  • 0.0 to 50.0°C (32.0 to 122.0°F)
  • Resolution 0.1°C / 0.1°F
  • Accuracy ±0.5°C / ±1.0°F
  • Calibration Automatic, 5 to 50 °C (41 to 122 °F)

Alarm pH

  • High or low alarm, can be activated or deactivated Salinity (EC)


  • High-Low Editable when high or low alarm active

Technical data:

  • Probes pH HI1286
  • EC permanently installed
  • Power supply 12V DC power adapter (included)
  • of 115 V AC and 230 V AC
  • Ambient 0 to 50°C (32 to 122°F); RH max 95%, non-condensing
  • Housing protection class IP65
  • Dimensions 125 x 185 x 38mm (4.92 x 7.28 x 1.49")
  • Weight 300g (10.6oz)

* Measuring range dependent on the probe used.

What's Included:

HI981520 is supplied with HI1286 pH electrode, attached conductivity electrode with temperature probe, pH 7.01 buffer solution (20mL sachet, 2 pcs), pH 10.01 buffer solution (20mL sachet, 2 pcs), salinity calibration solution 35 .00 ppt (20mL sachets, 2 pcs), cleaning solution (20mL sachets, 2 pcs), suction cup with clip (2 pcs), adhesive mounting tape (2 pcs), 12V DC power adapter, certificates for probes and instrument, quick start guide with QR code and download link for the operating instructions. 

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