High-Precision Digital ORP Meters & Oxidation Reduction Potential Analyzers

As a premier ISO-certified B2B manufacturer of electrochemical analytical instruments, Hangzhou Qiwei Instrument Co., Ltd. produces commercial-grade ORP Meters (Oxidation Reduction Potential Analyzers) engineered for water disinfection monitoring, wastewater treatment, swimming pool sanitation, and chemical process control.

Equipped with high-purity platinum ring reference electrodes and advanced microcomputer circuitry, our ORP instruments deliver fast response times, high anti-interference capability, and precise millivolt ($mV$) readouts to evaluate oxidizing and reducing water environments.

Get Bulk Wholesale Quote Download ORP Meter Specification

Portable ORP Tester
Model: ORP-2
Measuring range: (0 ~ ±1999) mV
Resolution: 1mV
Temperature Range: (0 ~ 60) ℃
Online Industrial ORP Contorller
Measurement Range: PH (0-14 ); ORP (± 1900 mV)
Accuracy: +0.02 PH; +1 mV
Resolution: 0.01 PH; 1mV
Stability: ≤ 0.02 PH/24 h; ≤ 3 mV/24 hours
Benchtop ORP Meter
Model: ORP-1
Accuracy: 0.01
Measuring Range: (0 ~ ±1999) mV; PH (0, 14)
Resolution: 1 mV; PH 0.01
Pen-Type ORP Meter
Measurement range: ± 1100 mV
Resolution: 1 mV
Precision: ± 15 mV
Calibration: The factory has been corrected, and the user can use it directly
Portable ORP Meter
Model: ORP-2
Measuring range: (0 ~ ±1999) mV
Resolution: 1mV
Temperature Range: (0 ~ 60) ℃

Explore Our ORP Measuring Instrument Series

Versatile oxidation reduction potential testing options designed for portable field compliance checks and certified laboratory workflows.

1. Portable Field ORP Testers

Rugged handheld meters packaged in waterproof carrying cases with platinum combination electrodes for rapid on-site redox potential verification in water treatment plants and swimming pools.

Measurement Range: -2000 to +2000 mV
IP65 waterproof field case with rechargeable battery
High accuracy platinum sensor probe included

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2. Benchtop Laboratory pH / ORP Analyzers

Dual-function laboratory instruments capable of measuring both pH and ORP ($mV$) simultaneously, featuring GLP compliant memory storage and USB data output for testing labs.

High resolution: 0.1 mV / 0.001 pH
Automatic Temperature Compensation (ATC)
Ideal for municipal & chemical research labs

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3. Online Industrial ORP Process Controllers

Continuous 24/7 online ORP sensors and controllers equipped with heavy-duty Ryton/PPS housing and industrial signal transmitters for automated chemical dosing control.

4-20mA / RS485 Modbus PLC integration
Relay control output for automated dosing pumps
Corrosion-resistant IP68 industrial immersion body

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Critical Industrial Applications & Engineering Strengths

Why Water ORP Monitoring is Vital

ORP measures the oxidizing or reducing capacity of aqueous solutions. It is a critical parameter for evaluating disinfection efficacy and chemical reactions. Key applications include:

Swimming Pool & Spa Sanitization: Monitoring free chlorine disinfection effectiveness via mV thresholds ($> 650\,mV$)
Wastewater Cyanide & Chromate Treatment: Controlling chemical reduction of hexavalent chromium and alkaline chlorination of cyanide
Aquaculture & Recirculating Systems: Assessing organic load and biological oxidation status
Industrial Process Water: Monitoring ozone, hydrogen peroxide, and chlorine dioxide dosing systems

Qiwei Manufacturing & OEM Advantages

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

High Purity Platinum Electrodes: Ensures stable potential response and high resistance to chemical corrosion
Ultra-Low Input Impedance Circuitry: Prevents signal drift and polarization errors in low-conductivity samples
OEM & ODM Customization: Logo branding, custom housing colors, and localized language software UI
Internal Links: Combine with our Electrochemical Instruments, Free Chlorine Analyzers, and Spectrophotometers for complete water analysis.

Frequently Asked Questions (ORP Meter Sourcing Guide)

Q1: What does a positive versus negative ORP reading indicate?

A positive ORP value ($+mV$) indicates an oxidizing environment (such as chlorinated water, ozonated water, or solutions with strong oxidizing agents). A negative ORP value ($-mV$) indicates a reducing environment (such as anaerobic biological digestion or water treated with reducing agents).

Q2: How do I test and verify the calibration of an ORP meter?

ORP meters are typically verified using standard quinhydrone buffer solutions or commercial mV check solutions (e.g., 220 mV or 468 mV standard solution). Unlike pH meters, ORP meters measure absolute millivolt potential and rarely require multi-point slope adjustment unless the platinum sensor is fouled.

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 ORP 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 orp meter in China, featured by quality products and good service. Please rest assured to buy bulk durable orp meter in stock here from our factory. We also accept customized orders.

Online Industrial ORP Contorller, Pen Type ORP Meter, Portable ORP Tester