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Hanna Instruments Inc., 584 Park East Drive, Woonsocket, RI 02895  USA

 

www.hannainst.com

HI981520 

Marine Monitor pH, Marine Salinity, and Temperature

Quick Reference Guide

All Hanna instruments conform to the CE European Directives and UK standards,  and our 

production facilities are ISO 9001 certified. 

HI981520

 is warranted for a period of two 

years and pH probe for six months against defects in workmanship and materials when  

used for their intended purpose and maintained according to instructions.  

For technical information e‑mail us at 

[email protected]

.  

Visit 

www.hannainst.com

 for more information about Hanna Instruments and our products.

Please retain for future use. 

QR981520 11/22

Please scan the QR code or follow the link to download 
the user manual.
https://manuals.hannainst.com/HI981520

Hanna

®

 is committed to developing and deploying digital solutions 

with a positive impact on the environment and climate.

Dear Customer, 

Thank you for choosing Hanna Instruments.
The 

HI981520

 Marine Monitor is the ideal solution for aquarists looking to continuously monitor salinity levels in their aquariums.

Application

: monitoring salinity in saltwater aquariums, seawater, or aquaculture

Package Contents

• 

HI981520

 monitor with attached EC & temperature probe

• 

HI1286

 replaceable pH electrode

•  pH 7.01 buffer solution, 20 mL (2 sachets)

•  pH 10.01 buffer solution, 20 mL (2 sachets)

•  35.00 ppt salinity calibration solution, 20 mL (2 sachets)

•  Electrode cleaning solution, 20 mL (2  sachets)

•  Suction cup (2 pieces)

•  Self‑adhesive strip (2 pieces)

•  12 VDC power adapter

•  pH electrode quality certificate
•  Quick reference guide with instrument quality certificate

Main Features

•  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

•  EC probe contains an integral temperature sensor that simplifies installation
•  All readings are compensated for variations in temperature

Brief Operational Overview

•  Use supplied strips to mount the Monitor (optional).

•  Slide the connector sheath down and connect the pH electrode to the BNC 

socket. Slide the sheath up and ensure connector is covered.

•  Connect the power adapter to the instrument and plug into the mains.

•  Press 

t

 to enter Setup.

•  Press 

e

 to enter edit mode. 

•  Press 

/

 v

 

to navigate menu and configure the operating limits 

of the process.

•  Remove the pH electrode protective cap and place 

both

 the pH electrode and 

the EC probe in the 

same

 pH calibration solution. 

•  Press 

z

 for pH calibration. Buffer solution is automatically recognized.

•  Place EC probe in calibration solution and press 

z

 to follow with 

conductivity calibration. Conductivity solution is automatically recognized.

•  Affix supplied suction cups to secure the probes in position.

•  When measuring, please ensure that both the pH electrode and the EC probe 

are immersed in the sample. For best results, please refer to the diagram 
below for proper placement.

   

  

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