HQ4300 Portable Multi-Meter

A robust and intuitive range of portable meters, instilling confidence in reporting and managing your results.

The HQ Series is for water quality professionals who want to perform electrochemical analysis for field and lab environments. Our new portable platform will allow you to collect intuitive, accurate measurements, manage data, and easily review results, while supplying an IP67 robustness rating.
They provide a true rugged, field-ready solution with on-screen, visual step-by-step operating guidance that provides users with confidence in reporting and managing their results. Unlike other field meters with basic user interfaces and without easily accessible data, the HQ Series secures, simplifies, and accelerates the complete measurement process for field users.

Choose from 4 models, including the three-input HQ4000 series, dual-input HQ2000 series, and single-input HQ1000 series. These meters offer a range in measurement versatility – eliminating the need for multiple pieces of equipment.


Performing a successful calibration has never been so simple

Most measuring issues are due to incorrect calibration procedures. With our illustrated, step-by-step on-screen calibration and troubleshooting procedures, water quality professionals can succeed every time.

Deliver your daily activity in just a few clicks

Whether you are at your facility or working in the field, the Hach® HQ Series portable meter ensures your data will be safely transferred via USB or optional Bluetooth*. Take advantage of additional data validation when you connect your field meter to Claros Data Management software.

Sensors designed for every application

We offer standard laboratory and rugged field Intellical smart sensors available with the HQ Series to measure a wide variety of parameters including Total Dissolved Solids (TDS), Optical Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Temperature, Conductivity, and pH. Intellical smart probes are automatically recognised by HQ meters, retain calibration history and method settings to minimise errors and setup time. They incorporate proven technology to deliver superior accuracy and response times – even when measuring challenging samples or challenging operating environments.

Peace of mind: Hach service and support will be there for you

Our Technical Support, Field Service, and Central Service Teams work together with over 80 years of electrochemistry expertise to help you maximise instrument uptime, ensure data integrity, maintain operational stability, and reduce compliance risk. Never feel alone when you need support.

Accessories Included No
Automatic Buffer Recognition Yes
Backlight Yes
Barometric Pressure Measurement Automatic compensation of DO when using an LDO or LBOD probe
Cable Length 1 m
Calibration Intervals/Alerts/Reminder Off, selectable from 2 hours to 7 days
Certifications CE, FCC, ISED, RCM, KC, ETL Verified: US DOE/ NRCan Energy Efficiency, RoHS
Data Export USB connection to PC or USB storage device (limited to the storage device capacity)
Data Memory 100,000 data points
Data Storage Automatic in Press to Read Mode and Interval Mode. Manual in Continuous Read Mode
Dimensions (H x W x D) 63 mm x 97 mm x 220 mm
Display Up to 3 parameters at a time, dependent on HQ model
Display Lock Function Continuous / Auto-stabilisation (“press to read”) / At Interval
Display Type 640×480 Colour TFT
DO Measurement Range 0.1 – 20.0 mg/L (ppm), 1 – 200% saturation
DO Resolution 0.1
Enclosure Rating IP67 (with battery compartment installed)
GLP Features Date; Time; Sample ID; Operator ID, Calibration
Inputs 3
Instrument Portable
ISE Direct Measurement Range Yes
ISE Electrode Calibration Yes
Kit? Yes
Languages English, Chinese – Simplified, Spanish, French, German, Italian, Japanese, Turkish, Dutch, Portuguese (PT & BR), Korean, Danish, Swedish, Polish, Norwegian, Hungarian, Greek, Finnish, Czech, Romanian, Croatian, Bulgarian, Slovak, Lithuanian, Estonian, Slovenian, Russian
Measurement method English, Chinese – Simplified, Spanish, French, German, Italian, Japanese, Turkish, Dutch, Portuguese (PT & BR), Korean, Danish, Swedish, Polish, Norwegian, Hungarian, Greek, Finnish, Czech, Romanian, Croatian, Bulgarian, Slovak, Lithuanian, Estonian, Slovenian, Russian
Measurement method Probe specific programmed method settings
Model HQ4300 Multi/ISE/3 Channels
mV Measurement at Stable Reading Yes
mV Measurement Range Yes
mV Resolution 0.1 mV
Operating Error Messages Clear text error messages displayed
Operating Humidity 90% (non-condensing)
Operating Interface Soft Touch Keypad
Operating Temperature 0 – 60 °C
ORP Electrode Calibration Predefined ORP standards (including Zobell’s solution)
Parameter pH
Dissolved Oxygen
pH Buffer Sets Colour-coded: 4.01, 7.00, 10.01 pH;
IUPAC: 1.679, 4.005, 7.000, 10.012, 12.45
DIN: 1.09, 4.65, 9.23
User-defined custom buffer sets
pH Electrode calibration 1 – 3 Calibration points
Calibration summary data logged and displayed
pH Measurement Range 0 – 14 pH
pH Resolution Selectable:
0.001/0.01/0.1 pH
Power supply Rechargeable lithium-ion battery 18650 (internal)
Class II, USB power adapter: 100 – 240 VAC, 50/60 Hz input; 5 VDC at 2 A USB power adapter output (external)
Probes included PHC10101, CDC40101, LDO10101
Probe Type Intellical Standard Laboratory or Rugged Field
Protection Class IEC Class III (SELV (Separated/Safety Extra-Low Voltage) powered); external
Region Australia, Argentina, Brazil, India, South Africa, Korea
Salinity Measurement Range 0 – 42 (ppt) (‰)
Salinity Resolution 0.01 (ppt) (‰)
Sensor A PHC20101
Sensor B CDC40101
Sensor C LDO10101
Software available Claros
Storage conditions -20 – 60 °C, max. 90% relative humidity (non-condensing)
TDS Measurement Range 0.00 mg/L – 50.0 g/L NaCl
TDS Resolution
0.01 mg/L – 0.1 g/L upon measuring range
Temperature Compensation Automatic Temperature compensation for pH
Temperature Measurement °C or °F
Temperature Resolution 0.1 °C
Type of measurement Field Measurements
Warranty 36 months
Weight 570 g (Meter only)
What’s included? HQ4300 Portable pH/ORP/EC/TDS/DO Meter, 3 channels for wastewater plant testing with Intellical PHC201 pH, CDC401 Conductivity, and LDO101 electrodes, 1 m Cables. Field accessories included.






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