AK131

Name: AK131 Max - pH meter with GLP
Brand: AKSO Instruments
SKU: AK131

Max - pH meter with GLP

Benchtop pH, ORP and temperature meter with GLP functions, USB and printer output for accurate, traceable laboratory results.

-2.000 to 19.999 pHpH Range

± 0.002 / ± 0.01 pHpH Accuracy

-2.000 to 19.999 pHpH Range

± 0.002 / ± 0.01 pHpH Accuracy

Download datasheet Instruction manual

Overview

The AK131 Max is the ideal choice for laboratories that require a robust, high-performance instrument with features that ensure accuracy, traceability, and reliable results.

The instrument has GLP (Good Laboratory Practices) functions, which allow you to set the validity of the last adjustment made, check which standards were used, monitor the results obtained, and consult the slope of the pH electrode.

Key features

GLP functions (Good Laboratory Practice): stores calibration date, standards used, electrode slope, and measurement history.
Temperature compensation: automatic (ATC) and manual (MTC).
Calibration standards: USA and NIST.
Illuminated LCD display for clear pH and temperature readings in any lighting condition.
Memory for up to 1000 records (manual or automatic), ensuring full traceability.
PC communication via USB for easy data transfer.
Printer communication via RS232 for direct report printing.
Optimized for pH measurements, but also capable of ORP measurements with an optional electrode.

Applications

Built for the field

Laboratory

Bench-grade accuracy for QC, research, and routine laboratory analysis.

Industrial

Specifications

Parameter	Range	Resolution	Accuracy
Measurement Specifications
pH	-2.000 to 19.999 pH	0.001 / 0.01 pH	± 0.002 / ± 0.01 pH
ORP / Redox Potential	-1999.9 to 1999.9 mV	0.1 mV	± 1 mV
Temperature	-5.0 to 100.0 °C	0.1 °C	± 0.5 °C

General Specifications
Automatic temperature compensation	-5 to 100 °C
Manual temperature compensation	-5 to 100 °C
Electrode operating temperature	0 to 50 °C
Memory	1000 records
PC communication	USB Type A
Printer communication	RS232
Display backlight	On/Off
Freezing the reading (HOLD)	Manual / Automatic
Operating humidity	10 to 90 %RH (non-condensing)
Protection rating	IP65
Power supply	220 VAC / 12 VDC
Charge indicator	Visual
Dimensions	216 x 190 x 59 mm
Weight	950 g
Calibration points	USA: 1.68 / 4.01 / 7.01 / 10.01 / 12.45 pH · NIST: 1.68 / 4.00 / 6.86 / 9.18 / 12.45 pH

What's in the kit

1 pH glass electrode with double junction — AK1005
1 temperature probe — AK1040
1 electrode holder — AK1070
1 power supply 12 Vdc — AK1075
1 USB cable — AK1090
Sample solutions pH 4, 7, 10 and KCl, 20 mL
AK1005 — Double-Junction Glass pH Electrode
AK1075 — Power Supply 220 VAC / 12 VDC
AK1070 — Electrode Holder
AK1040 — Temperature Probe for Portable and Bench Meters
AK1090 — USB Cable
AK1004 — Combined pH Electrode with Ceramic Junction
AK1050 — pH Electrode for AK90
AK1055 — Conductivity Electrode for AK51

Accessories

Replacement parts, calibration solutions, and maintenance supplies for the AK131.

AK4504

pH 4.01 calibration buffer solution

Learn more

AK4507

pH 7.01 Calibration Buffer Solution

Learn more

AK4510

pH 10.01 Calibration Buffer Solution

Learn more

AK4530

3 M KCl Potassium Chloride Storage Solution (250 ml)

Learn more

AK1010

ORP Electrode

Learn more

Maintaining your pH electrode

Regular cleaning ensures measurement accuracy and extends electrode life. Follow this procedure periodically.

1
Prepare a small beaker with electrode cleaning solution (pepsin)
2
Leave the electrode tip immersed in the solution for 30 minutes
3
Rinse the electrode in distilled water
4
Remove excess water using a soft paper towel
5
Store the electrode in KCl 3M potassium chloride solution for 1 hour
6
Your tester is now ready for calibration — always use fresh calibration solutions