Hanna Instruments Australia
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Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm
Hanna Instruments Australia
Sales: (03) 9769 0666   |    Mon to Fri: 8:30am – 5:00pm

Marine Monitor pH, Marine Salinity, and Temperature - HI981520


Marine Line

The system can be calibrated at one or two points for pH and at one point for conductivity. Seawater salinity is expressed in either parts per thousand (ppt), Practical Salinity Units (PSU), or Specific Gravity (S.G.).

Testing and monitoring salinity in saltwater aquariums is an ongoing task. The HI981520 is an easy to use vertical mount unit that continuously monitors and displays conductivity and pH.



A high/low alarm can be configured for each parameter and the results are displayed on a large, easy to read LCD.

The attached two-electrode conductivity probe features a built-in temperature sensor for rapid, high-accuracy temperature readings.

The Hanna HI1286 pH double junction, gel-filled pH electrode features a PEI resin body that is easy to clean and resistant to many aggressive chemicals. Additionally, the double junction design is less susceptible to clogging for fast and stable readings.

Two Alarm operating modes (High/Low Value) for each supported parameter

High/Low Alarm generated when measured value exceeds or drops below configured parameter High/Low Value

Acoustic signal generated each time an alarm is triggered

All readings are compensated for variations in temperature

Temperature is displayed in ℃ or ℉ along with pH and EC readings

The EC probe contains an integral temperature sensor that simplifies installation

Easy to read LCD display

SKU HI981520-02
Name Marine Monitor pH, Marine Salinity, and Temperature - HI981520
pH Range 0.0 to 14.0 pH
pH Resolution 0.1 pH
pH Accuracy ±0.2 pH
pH Calibration Manual or automatic two-point calibration
in 7.01 and 10.01 pH
PPT Range 0.0 to 70.0 ppt (g/L)
PPT Resolution 0.1 ppt (g/L)
PPT Accuracy ±1.0 ppt between 0.0 ppt and 40.0 ppt
±2.0 ppt between 40.0 ppt and 70.0 ppt
PPT Calibration Automatic, single point in 35.00 ppt
PSU Range 0.0 to 70.0 PSU
PSU Resolution 0.1 PSU
PSU Accuracy ±1.0 PSU between 0.0 PSU and 40.0 PSU
±2.0 PSU between 40.0 PSU and 70.0 PSU
Temperature Range 0.0 to 50.0 °C (32.0 to 122.0 °F)
Temperature Resolution 0.1 °C / 0.1 °F
Temperature Accuracy ±0.5 °C / ±1.0 °F
Temperature Calibration Automatic, 5 to 50 °C (41 to 122 °F)
Alarm pH/EC/Temperature High or Low with Enable or Disable option
High/Low Value With High/Low alarm enabled
Probes pH HI1286
Probes EC Attached
Power Supply 12 Vdc adapter (included) from 115 Vac, and
230 Vac
Environment 0 to 50°C (32 to 122°F); RH max 95%, noncondensing
Casing IP65 ingress protection
Dimensions 125 x 185 x 38 mm (4.92 x 7.28 x 1.49”)
Weight 300 g (10.6 oz)
HI981520 is supplied with HI1286 pH electrode, attached conductivity and temperature probe, pH 7.01 buffer solution, 20 mL sachet (2 pcs.), pH 10.01 buffer solution, 20 mL sachet (2 pcs.), 35.00 ppt salinity calibration solution, 20 mL sachet (2 pcs.), electrode cleaning solution, 20 mL sachet (2 pcs.), suction cup with clip (2 pcs.), self‑adhesive fastener (2 pcs.), 12 Vdc power adapter, probe quality certificate, instrument quality certificate, quick reference guide with QR code and URL link for manual download.

All prices are inclusive of GST and not all items are stock items, if you require an immediate solution please send an email to sales@hannainst.com.au or call us on (03) 9769 0666.

Free standard delivery: We offer free delivery within Australia on orders over $100, typically arriving within 5 to 7 days. Delivery times may vary depending on the courier service and the recipient's location. Free shipping is not available with other offers or discounts.

Same-day despatch: Place your order before 1 PM Monday to Friday for same-day despatch. Delivery times may vary depending on the courier service and the recipient's location. Subject to stock availability.

Please note that we do not offer shipping to PO Box addresses.

Additional information

Weight 0.3 kg