High-Precision Digital pH Meters & Laboratory pH Analyzers

As a premier ISO-certified B2B manufacturer of electrochemical analytical instruments, Hangzhou Qiwei Instrument Co., Ltd. produces commercial-grade Digital pH Meters (pH Analyzers) engineered for water treatment, pharmaceutical R&D, food and beverage processing, and environmental laboratory testing.

Equipped with advanced glass combination electrodes, microcomputer processing circuits, and Automatic Temperature Compensation (ATC), our pH meters deliver exceptional measurement accuracy ($\pm 0.002\,pH$), rapid response times, and GLP-compliant data logging.

Get Bulk Wholesale Quote Download pH Meter Specification

Desktop PH Meter
Model: PHS-3DW
Measuring Range: PH: 0 ~ 14.00; mV: ±1999; Temperature: 0 ~ 100 °C
Resolution: PH: 0.01/0.1; Temperature: ±1°C
Precision: PH: 0.01; Temperature: ±1°C
Portable PH Tester
Model: PHB-1
Measuring Range: PH: 0~14.00; Temperature: 0~60 °C; mV: ±1600
Resolution: PH: 0.01; Temperature: ±1 °C
Precision: PH: 0.01; Temperature: ±1 °C
Portable PH Meter
Measurement Range: 0.00 ~ 14.00 PH
Level: 0.1
Display: LCD display
Advantage: Easy to carry, equipped with E201-C composite electrode
Handheld PH Meter
Model: PHB-4
Measuring Range: PH: 0~14.00; Temperature: 0~60 °C; mV: ±1999
Resolution: PH: 0.01; Temperature: ± 1 °C
Precision: PH: 0.01; Temperature: ± 1 °C
Portable PH Pen
Model: PH-20, PH-20W
Measuring range: PH: 0.1-14.0
Resolution: PH: 0.1; Temperature: 0.1°C 1F
Accuracy: PH: ± 0.1; Temperature: 1°C/2F
Handheld PH Pen
Model: PH-220, PH-220B, PH-220BW
Measuring range: pH: 0.01-14.0
Resolution: PH: 0.01; Temperature: 0.1°C 1F
Accuracy: PH: ±0.01; Temperature: 1°C/2F
Laboratory Benchtop PH Meter
Instrument type: PHS-25/25C, PHS-2C
Measurement range: 0.00 ~14.00 PH; ±1999 mV
Precision: ±0.05 PH, ±0.02 PH
Resolution: 0.01 PH
Benchtop PH Meter
Instrument type: PHS-3C
Measurement range: 0.00 ~14.00 PH; 0 ~ 100 °C; ±1999 mV
Precision: ±0.01 PH
Resolution: 0.01 PH
Microprocessor PH Meter
Model: PHS-3E
Measuring Range: PH: -2 ~ 18.00; mV: ±1999; Temperature: 0 ~ 100 °C
Resolution: PH: 0.01/0.1; Temperature: ±1°C
Precision: PH: 0.01; Temperature: ±1°C
Microcomputer Benchtop PH Meter
Model: PHS-3CW
Measuring Range: PH: 0 ~ 14.00; mV: ±1999; Temperature: 0 ~ 100 °C
Resolution: PH: 0.01/0.1; Temperature: ± 1°C
Precision: PH: 0.01; Temperature: ±1°C
Online Industrial PH Controller
Model: PH-110
Measurement range: PH (0-14); ORP (±1900 mV)
Accuracy: +0.02 PH; +1 mV
Resolution: 0.01 PH; 1mV

Explore Our pH Measuring Instrument Series

Versatile pH testing options designed for portable field inspection, precision benchtop laboratory analysis, and continuous industrial process control.

1. Laboratory Benchtop pH / mV Meters

High-accuracy benchtop instruments featuring large backlit LCD displays, 1 to 5 point automatic buffer recognition, and USB data transmission for certified R&D laboratories.

pH Range: -2.000 to 20.000 pH ($\pm 0.002\,pH$)
Automatic Temperature Compensation (ATC)
GLP compliant memory for up to 1000 data sets

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2. Portable Field pH Testers

Rugged handheld meters packaged in waterproof field cases with rugged glass electrodes for rapid on-site water quality verification in rivers, wastewater outfalls, and soil testing.

Measurement Range: 0.00 to 14.00 pH
IP65 waterproof housing with rechargeable battery
Automatic buffer calibration (USA/NIST standards)

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3. Online Industrial pH Process Controllers

Continuous 24/7 online pH sensors and industrial transmitters equipped with heavy-duty Ryton/PPS housing and relay control outputs for automated chemical dosing systems.

4-20mA / RS485 Modbus PLC integration
Dual relay control for acid/alkali dosing pumps
Corrosion-resistant IP68 industrial immersion body

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Critical Industrial Applications & Engineering Strengths

Why Water pH Monitoring is Vital

pH measures the hydrogen ion activity in aqueous solutions, serving as the most fundamental indicator of chemical balance. Key applications include:

Municipal Wastewater Treatment: Neutralizing acidic or alkaline industrial effluent before biological treatment
Drinking Water Purification: Optimizing coagulation and flocculation efficiency during water treatment
Pharmaceutical & Biotechnology: Maintaining precise culture medium pH for fermentation and synthesis
Food & Beverage Processing: Quality control in brewing, dairy, and bottling lines

Qiwei Manufacturing & OEM Advantages

Supporting global electrochemical instrument distributors, system integrators, and brand owners:

High Input Impedance Circuitry: Ultra-low bias current $(< 1\,pA)$ prevents glass electrode polarization and signal drift
Comprehensive Electrode Portfolio: General purpose, spear-tip, flat-surface, and double-junction gel electrodes
OEM & ODM Customization: Logo branding, custom housing colors, and localized language software UI
Internal Links: Combine with our ORP Meters, Electrochemical Instruments, and Spectrophotometers for complete water analysis.

Frequently Asked Questions (pH Meter Sourcing Guide)

Q1: Why is Automatic Temperature Compensation (ATC) important for pH measurement?

Solution pH and glass electrode slope change directly with temperature according to the Nernst equation. ATC uses an integrated temperature sensor (such as Pt1000 or NTC) to automatically correct potential shifts, ensuring accurate pH readings across varying temperatures.

Q2: How often should a laboratory pH meter be calibrated?

For precise laboratory work, we recommend daily multi-point calibration (using pH 4.01, 7.00, and 10.01 buffers). For routine wastewater screening, weekly calibration is usually sufficient depending on sample conditions.

Q3: Do you support OEM custom branding and wholesale distributor pricing?

Yes, as a factory-direct manufacturer, we offer complete OEM/ODM custom branding, customized UI interfaces, private label packaging, and tiered volume discounts for global laboratory suppliers.

Require Factory Direct Pricing or Custom pH Testing Equipment?

Get in touch with Hangzhou Qiwei Instrument today for technical consultation, electrode options, and competitive distributor pricing within 24 hours.

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Hangzhou Qiwei Instrument Co., Ltd. is one of the most reliable manufacturers and suppliers of ph meter in China, featured by quality products and good service. Please rest assured to buy bulk durable ph meter in stock here from our factory. We also accept customized orders.

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