NIST-Traceable pH Buffer Solutions, Calibration Standards & Reagents

As a premier ISO-certified B2B manufacturer of analytical accessories, Hangzhou Qiwei Instrument Co., Ltd. offers a comprehensive lineup of high-purity Calibration Buffers, Conductivity Standards, and Electrode Maintenance Solutions engineered to ensure GLP compliance and measurement accuracy for global laboratory distributors and testing facilities.

Formulated under strict quality control with NIST traceability, our standard solutions include pH 4.01, 7.00, and 10.01 buffers, 1413 $\mu S/cm$ conductivity standards, ORP check solutions, and professional electrode storage/cleaning reagents.

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Conductivity Sensor Element
Model: DJS-0.1, DJS-1, DJS-10
Vessel Constant: 0.1±0.02, 1±0.2, 10±2
DO Electrode
Measuring Range: Dissolved oxygen: (0~20) mg/L; Temperature: (0~40℃)
Basic Error: Dissolved oxygen: ±0.3 mg/L; Temperature: ±1℃
Aftercurrent: ≥ 0.15 mg/L
Response Time: No...
Ion-Selective Electrode
Electrode: Fluoride, Chloride, Bromide
Model: F201, CL201, Br201
Description: Crystal, Solid state, Solid state
Optimum PH Range: 5~6, 2~12, 2~11
PH Flat Electrode
Model: E-201-M
Measuring range (PH): 0~14
Measuring temperature (℃): 0~60
Zero (PH): 7±0.5
PH Composite Electrode
Model: E201-C
pH Range: 0~14PH
Media Temp: 5~60°C
Internal Resistance: ≤120 MΩ (at 25°C)
PH Corrosion-Resistant Electrode
Pressure resistance: 0.6 MPa
Installation dimensions: 3/4 NPT pipe threads on both the top and bottom
Material: Polytetrafluoroethylene
Connection: Low-noise cable...
PH Glass Composite Electrode
Model: 95-1
Measuring range (PH): 0~14
Measuring temperature (℃): 0~80
Zero (PH): 7±0.5
Industrial Online PH Electrode
Examine industrial online pH electrodes for ongoing pH monitoring in chemical processing, paper manufacturing, wastewater treatment, and electroplating. Verify the controller connection choices,...

Explore Our Calibration Solutions & Reagents

Certified buffer solutions and electrode maintenance reagents designed for precise calibration and extended sensor lifespan.

1. pH Buffer Solutions & Powders

High-accuracy pH buffer solutions (pH 4.01, 7.00, 10.01) and space-saving buffer capsules/powders traceable to NIST standards with temperature correction tables on every bottle.

Accuracy: $\pm 0.01\,pH$ at $25^\circ C$
Available in 250ml, 500ml bottles and dry powder sachets
Compatible with all pH Meters

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2. Conductivity & ORP Calibration Standards

Precision conductivity standard solutions (84 $\mu S/cm$, 1413 $\mu S/cm$, 12.88 $mS/cm$) and 220 mV / 468 mV ORP verification check solutions for electrochemical probe calibration.

Exact conductivity and mV millivolt certified values
Optimized for ORP Meters and EC meters
Sealed anti-contamination packaging

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3. Electrode Cleaning & Storage Solutions

Specialized 3M KCl electrode storage solutions and protein/oil cleaning reagents designed to restore sluggish glass bulbs and extend sensor operational lifespan.

Prevents reference junction clogging and dehydration
Essential maintenance for Electrochemical Electrodes
Custom OEM private label packaging available

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Critical Laboratory Applications & Sourcing Advantages

Why Certified Calibration Standards Matter

Accurate electrode calibration is the foundation of reliable electrochemical analysis. Key sectors requiring certified buffers include:

Pharmaceutical & GLP Laboratories: Meeting stringent audit requirements and NIST traceability standards
Environmental Water Testing: Ensuring regulatory compliance for municipal wastewater and drinking water monitoring
Food & Beverage Quality Control: Maintaining precision during acidity and salinity testing
Third-Party Testing Facilities: Guaranteeing inter-laboratory measurement reproducibility

Qiwei Manufacturing & OEM Advantages

Supporting global laboratory suppliers, system integrators, and brand owners:

Rigorous Batch Testing: Each production lot is tested and certified with precise temperature compensation data
OEM & ODM Customization: Private label branding, multi-language packaging, and custom volume packaging
Reliable Global Export: Secure leak-proof reagent bottles with MSDS safety documentation
Internal Links: Combine with our Electrochemical Instruments and Water Quality Test Equipment for complete laboratory procurement.

Frequently Asked Questions (Buffer Solutions Sourcing Guide)

Q1: What is the shelf life of opened versus unopened pH buffer solutions?

Unopened NIST-traceable buffer solutions typically maintain stability for 12 to 24 months when stored at room temperature away from direct sunlight. Once opened, neutral (pH 7.00) buffers last about 1–2 months, while alkaline (pH 10.01) buffers degrade faster due to absorption of atmospheric carbon dioxide and should be replaced within 4–6 weeks.

Q2: Do you support OEM private-label manufacturing for calibration solutions?

Yes! As a direct factory manufacturer, we offer comprehensive OEM and ODM services, allowing global laboratory distributors to market pH buffers and calibration standards under their own brand name and custom bottle design.

Q3: How do I request bulk wholesale pricing and technical MSDS sheets?

You can request bulk quotations, product datasheets, or material safety data sheets (MSDS) by clicking the "Get Bulk Wholesale Quote" button above or visiting our Inquiry Page. Our team responds within 24 hours.

Require Factory Direct Pricing or Custom Calibration Reagents?

Get in touch with Hangzhou Qiwei Instrument today for technical consultation, buffer specifications, 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 electrode in China, featured by quality products and good service. Please rest assured to buy bulk durable electrode in stock here from our factory. We also accept customized orders.

PH Corrosion Resistant Electrode, PH Flat Electrode, PH Glass Composite Electrode