£213.01

Apera Instruments Apera GroStar Series GS4 pH/EC/500ppm/700ppm Multiparameter Pen Tester Kit (Gen II) with Replaceable pH/EC Probe for Hydroponics Water Quality Testing

AI104G

Price data last checked 14 day(s) ago - will refresh soon

View at Amazon

Price History & Forecast

Last 77 days • 77 data points (No recent data available)

Historical
Generating forecast...
£213.01 £184.40 £190.64 £196.88 £203.13 £209.37 £215.61 24 January 2026 12 February 2026 03 March 2026 22 March 2026 10 April 2026

Price Distribution

Price distribution over 77 days • 3 price levels

Days at Price
Current Price
68 days 6 days 3 days · current 0 17 34 51 68 £187 £210 £213 Days at Price

Price Analysis

Most common price: £187 (68 days, 88.3%)

Price range: £187 - £213

Price levels: 3 different prices over 77 days

Description

Apera Instruments GroStar GS4 pH/EC/ppm Combo Pen Tester (Gen II) is a lab-grade multi-parameter meter designed specifically for growers to easily manage crop success, featuring a replaceable pH/EC combo sensor and a grower-friendly workflow along with other intelligent functions and features that help reduce the guesswork and give you confidence in every measurement. Tester Kit contains: GroStar GS4, calibration solutions (pH 4.00 + pH 7.00 + 2.77 EC, 50ml each), 3M KCl storage solution, 4 AAA batteries, lanyard.

Key Features

Lab-grade instrument designed specifically to meet growers' needs and habits

The replaceable pH/EC combo probe is designed to measure temperature, pH value, and conductivity (EC/500ppm/700ppm) in range of 0 to 10 EC, with high accuracy

Grower-friendly calibration workflow on an HD backlit screen allows you to finish 2-point calibration within a minute

Electrode condition indicator and calibration reminder function help you perform proper maintenance

TruRead measurement mode automatically generates the average, maximum, and minimum readings from multiple measurements, helping you to minimize the measurement error

Product Specifications

Barcode

No barcode data available

Similar Products You Might Like

Apera GroStar Series GS3 EC/500ppm/700ppm Pen Tester Kit (Gen II) with Replaceable Titanium EC Probe for Hydroponics Water Quality Testing
98% match

Apera GroStar Series GS3 EC/500ppm/700ppm Pen Tester Kit (Gen II) with Replaceable Titanium EC Probe for Hydroponics Water Quality Testing

Apera Instruments

£123.57 17 Apr 2026
Apera Instruments LabSen 213 Glass 3-in-1 Glass pH/Temp. Electrode for General Water Solutions in Scientific Research and Quality control, TRIS buffer compatible
98% match

Apera Instruments LabSen 213 Glass 3-in-1 Glass pH/Temp. Electrode for General Water Solutions in Scientific Research and Quality control, TRIS buffer compatible

Apera Instruments

£125.82 05 Apr 2026
Apera Instruments PC910 Benchtop pH/Conductivity Multiparameter Meter Kit with Dual-Channel Simultaneous pH/cond. Measurement
98% match

Apera Instruments PC910 Benchtop pH/Conductivity Multiparameter Meter Kit with Dual-Channel Simultaneous pH/cond. Measurement

Apera Instruments

£543.56 10 Apr 2026
Apera Instruments PH700 Benchtop Lab pH Meter, 0.01 pH Accuracy, 1-3 Points Auto Calibration, 3-in-1 pH/Temp. Electrode
97% match

Apera Instruments PH700 Benchtop Lab pH Meter, 0.01 pH Accuracy, 1-3 Points Auto Calibration, 3-in-1 pH/Temp. Electrode

Apera Instruments

Out of Stock 14 Apr 2026
Apera Instruments SX751 pH/DO/ORP/EC/TDS/Salinity/Resistivity Multiparameter Portable Meter Kit (Waterproof, Data Logging, Autom. Temperature Compensation and Calibration)
97% match

Apera Instruments SX751 pH/DO/ORP/EC/TDS/Salinity/Resistivity Multiparameter Portable Meter Kit (Waterproof, Data Logging, Autom. Temperature Compensation and Calibration)

Apera Instruments

£1,131.26 11 Apr 2026
Apera Instruments PC9500 Research-Grade Benchtop pH/Conductivity Multiparameter Meter Kit with Comprehensive GLP Data Management and Data Output to Printer/PC
97% match

Apera Instruments PC9500 Research-Grade Benchtop pH/Conductivity Multiparameter Meter Kit with Comprehensive GLP Data Management and Data Output to Printer/PC

Apera Instruments

£1,053.14 11 Apr 2026
Apera Instruments AI3101 LabSen 211 Professional Glass Combination pH Electrode for regular water solutions in scientific research and quality control, TRIS buffer compatible, BNC Connector
97% match

Apera Instruments AI3101 LabSen 211 Professional Glass Combination pH Electrode for regular water solutions in scientific research and quality control, TRIS buffer compatible, BNC Connector

Apera Instruments

£73.78 09 Apr 2026
Apera Instruments AI413 PC400 Portable Multi-Parameter Meter Kit (pH/EC/TDS/Temp.), 6 Bottles of Calibration Solutions Included, 1.3" Height, 3.4" Wide, 7" Length
97% match

Apera Instruments AI413 PC400 Portable Multi-Parameter Meter Kit (pH/EC/TDS/Temp.), 6 Bottles of Calibration Solutions Included, 1.3" Height, 3.4" Wide, 7" Length

Apera Instruments

£336.15 09 Apr 2026
Apera Instruments AI3103 LabSen 241-6 Professional Combination pH Electrode for Small Samples (>0.2 mL), BNC Connector, Lead-Free Glass
97% match

Apera Instruments AI3103 LabSen 241-6 Professional Combination pH Electrode for Small Samples (>0.2 mL), BNC Connector, Lead-Free Glass

Apera Instruments

£163.55 12 Apr 2026
Apera Instruments PC800 Benchtop pH/Conductivity Meter Kit (Equipped with 201T-F 3-in-1 pH Combination Electrode/Probe and BPB 2301T-F Conductivity Electrode; GLP Data management)
97% match

Apera Instruments PC800 Benchtop pH/Conductivity Meter Kit (Equipped with 201T-F 3-in-1 pH Combination Electrode/Probe and BPB 2301T-F Conductivity Electrode; GLP Data management)

Apera Instruments

£713.78 15 Apr 2026
Apera Instruments SX731 pH/ORP/Conductivity Multiparameter Portable Meter Kit (Waterproof, Data Logging, Autom. Temperature Compensation and Calibration)
97% match

Apera Instruments SX731 pH/ORP/Conductivity Multiparameter Portable Meter Kit (Waterproof, Data Logging, Autom. Temperature Compensation and Calibration)

Apera Instruments

£812.38 15 Apr 2026
Apera Instruments AI3107 LabSen 371 Professional Combination Flat pH Electrode for Surface Test, BNC Connector, POM
97% match

Apera Instruments AI3107 LabSen 371 Professional Combination Flat pH Electrode for Surface Test, BNC Connector, POM

Apera Instruments

£110.96 11 Apr 2026
Apera Instruments AI412 EC400 Portable EC (Conductivity)/TDS Meter Kit, 0 to 200.0 MS/cm Measuring Range
97% match

Apera Instruments AI412 EC400 Portable EC (Conductivity)/TDS Meter Kit, 0 to 200.0 MS/cm Measuring Range

Apera Instruments

£222.45 16 Apr 2026
Apera Instruments Premium Series PC8500 Portable Handheld pH/Conductivity Meter Kit
97% match

Apera Instruments Premium Series PC8500 Portable Handheld pH/Conductivity Meter Kit

Apera Instruments

£659.63 19 Apr 2026
Apera Instruments MP511 Benchtop pH Meter Kit (Accuracy: 0.01 pH, Range: -2.00-19.99 pH)
97% match

Apera Instruments MP511 Benchtop pH Meter Kit (Accuracy: 0.01 pH, Range: -2.00-19.99 pH)

Apera Instruments

£485.05 10 Apr 2026
Apera Instruments PH Calibration Solution pH4.01/7.00/10.01 and 3M KCl each 250 ml,AI1104
97% match

Apera Instruments PH Calibration Solution pH4.01/7.00/10.01 and 3M KCl each 250 ml,AI1104

Apera Instruments

£51.23 18 Mar 2026
Apera Instruments PH60 Premium pH Meter, Pocket Tester, replaceable probe, ±0.01 pH Accuracy, -2.00-16.00 pH Range, ±0.5°C Temperature Sensor
97% match

Apera Instruments PH60 Premium pH Meter, Pocket Tester, replaceable probe, ±0.01 pH Accuracy, -2.00-16.00 pH Range, ±0.5°C Temperature Sensor

Apera Instruments

£91.99 21 Apr 2026
Apera Instruments AI421 PH400S Portable Ph Meter Kit, 0.01 Ph Accuracy, -2.00 to 19.99 pH Range, GLP Data Management (500 Groups of Data Storage), USB Data Output, 1.3" Height, 3.4" Wide, 7" Length
97% match

Apera Instruments AI421 PH400S Portable Ph Meter Kit, 0.01 Ph Accuracy, -2.00 to 19.99 pH Range, GLP Data Management (500 Groups of Data Storage), USB Data Output, 1.3" Height, 3.4" Wide, 7" Length

Apera Instruments

£271.68 12 Apr 2026
Apera Instruments EC8500 Portable pH/Conductivity/TDS/Salinity Meter Kit
97% match

Apera Instruments EC8500 Portable pH/Conductivity/TDS/Salinity Meter Kit

Apera Instruments

£413.98 14 Apr 2026
Apera Instruments PC850 Portable pH/Conductivity Meter Kit
97% match

Apera Instruments PC850 Portable pH/Conductivity Meter Kit

Apera Instruments

£434.33 14 Apr 2026
Apera Instruments AI480 Dissolved Oxygen Meter Kit, DO850, Hassle-Free Testing Experience, With 10' Optical DO Probe
97% match

Apera Instruments AI480 Dissolved Oxygen Meter Kit, DO850, Hassle-Free Testing Experience, With 10' Optical DO Probe

Apera Instruments

£786.76 12 Apr 2026
Apera Instruments PH9500 Research-Grade Benchtop pH Meter Kit with Comprehensive GLP Data Management and Data Output to Printer/PC
97% match

Apera Instruments PH9500 Research-Grade Benchtop pH Meter Kit with Comprehensive GLP Data Management and Data Output to Printer/PC

Apera Instruments

£621.68 11 Apr 2026
Apera Instruments EC700 Benchtop Conductivity Meter Kit (Equipped with 2301T-F Combination Conductivity Electrode; Accuracy: ±1% F.S, Range: 0 to 200.00 mS/cm)
97% match

Apera Instruments EC700 Benchtop Conductivity Meter Kit (Equipped with 2301T-F Combination Conductivity Electrode; Accuracy: ±1% F.S, Range: 0 to 200.00 mS/cm)

Apera Instruments

£305.23 16 Apr 2026
Apera Instruments SX625 PH Electrode for SX620 pH Meter
97% match

Apera Instruments SX625 PH Electrode for SX620 pH Meter

Apera Instruments

£46.11 10 Apr 2026