Hanna Instruments

Scientific Equipment

Safety Data Sheets

SDS search & quick download

Free Delivery

Most of mainland GB for orders over £50. Other charges may apply - see more

Hanna Care

We take the long view, looking after existing customers as much as delighting new ones!

Certificates of Analysis

Download a copy of the certificate of analysis for your solution

HI-9811-5 pH/EC/TDS/°C Portable Meter

HI-9811-5 pH/EC/TDS/°C Portable Meter

HANNA HI-9811-5 pH/EC/TDS/°C Portable Meter

HI-9811-5 pH/EC/TDS/°C Portable Meter

Complete with probe
2 year manufacturer warranty
In Stock
£242.80 (exc. VAT) £291.36 (inc. VAT)

HI-9811-5N is a versatile, water resistant multi-parameter portable meter specifically designed for agricultural applications such as hydroponics, greenhouses, farming and nurseries. It features an extra large LCD that clearly displays the parameter being measured as well as calibration instructions.

HI-9811-5 pH/EC/TDS/°C Portable Meter information

Hanna's extended description

Portable pH/EC/TDS/Temperature meter

HI-9811-5 is a pH/EC/TDS waterproof meter designed for simplicity in taking pH, µS/cm, ppm (mg/L) and temperature measurements. Both the HI-9811-5 and HI-9812-5 are ideal for hydroponics, greenhouses, farming and ground water applications.

Due to the built-in temperature sensor, conductivity readings are automatically compensated for temperature changes. No probe changes are required when switching your measured parameter between pH, conductivity and TDS. These multi-parameter meters reduce the number of instruments required for daily water quality analysis.

The specially engineered HI-1285-5 pH/EC/TDS and temperature probe utilises a fibre junction and gel electrolyte which provide a fast response and reduced contamination. This combination makes the HI-1285-5 particularly designed to withstand harsh environments such as fertiliser solutions.

Key features

  • Water resistant
  • On-screen tutorial messages for calibration
  • BEPS (Battery Error Prevention System) alerts the user in the event that low battery power could adversely affect readings
  • Switch parameters at the touch of a button
  • Automatic Temperature Compensation for pH and conductivity
  • Simple calibration
  • Battery % displayed on start-up
  • Fast response multi-parameter probe

Supplied with

  • HI-1285-5 multi-parameter probe
  • HI-70007 pH 7.01 calibration solution sachet
  • HI-70032 1382 ppm (mg/L) calibration solution sachet
  • HI-70031 1413 µS/cm calibration solution sachet
  • HI-700661 electrode cleaning solution sachets (2)
  • Battery and instructions
  • Rugged carrying case

Replaceable Electrode – No need to replace the whole meter when the electrode needs replacing. Spare and replacement electrodes are available for this product.

Water Resistant – Can withstand temporary exposure to water, but should not be submerged or washed under running water.


Specifications list


Range - EC 0 to 6000 µS/cm
 TDS 0 to 3000 ppm (mg/L)
 Temperature 0.0 to 70.0°C
Resolution - pH 0.1 pH
 EC 10 µs/cm
 TDS 10 ppm (mg/L)
 Temperature 0°C
Range - pH 0.0 to 14.0 pH
Accuracy (@20°C/68°F) - pH ±0.1 pH
 EC ±2% F.S.
 TDS ±2% F.S.
 Temperature ±1°C
TDS Conversion Factor 0.5 ppm (mg/L) = 1 µS/cm
pH Calibration manual, 1 point through offset trimmer
EC/TDS Calibration manual, 1 point through slope trimmer
EC/TDS Temperature Compensation automatic from 0 to 50°C (32 to 122°F) with β = 2% /°C
Probe HI 1285-5 pH/EC/TDS/T, 1 m cable (included)
Battery Type / Life 9V / approximately 150 hours of continuous use
Environment 0 to 50°C (32 to 122°F); RH 100%
Dimensions / Weight 145 x 80 x 36 mm (5.7 x 3.1 x 1.5”) / 230 g (8.1 oz.)
The equipment was good value and securely packaged

Good value and very easy to calibrate. - by Trusted Customer

Questions & Answers

Got a question to ask? Use this form to submit your question.
Question will be displayed after moderation.
Name* Product Question*
No questions yet?
Don 't be shy, be the first to ask.