Does this product support customization?

Yes, we offer full customization, minor customization, and customization from samples or designs.

What are the payment terms for this product?

We accept LC, T/T, D/P, PayPal, Western Union, and small-amount payments.

What is the minimum order quantity?

The minimum order quantity is 1 set.

Calibration Point 4.01 6.86 9.18 pH Buffer Powder pH Test Meter Test Measure Calibration Solution

Name: Calibration Point 4.01 6.86 9.18 pH Buffer Powder pH Test Meter Test Measure Calibration Solution
Brand: Zhengzhou Wollen Instrument Equipment Co., Ltd.
SKU: 796895202

Henan, ChinaZhengzhou Wollen Instrument Equipment Co., Ltd.

US$0.30-0.90

10 Sets

Product profile

Customization

Available

Portable

Appliance

Food Analysis, Medical Research, Biochemistry

Certification

ISO9001, CE

Name of Commodity

pH Buffer Powder

Product Standard

Bagged Powder

Weight

About 3G Each Bag

pH Value

4.01, 6.86 and 9.18

Proportion

250ml Standard Solution Per Bag

Expiration Date

Two Years

Transport Package

Carton Box

Specification

3g/bag

Trademark

WollenLab

Origin

China

HS Code

2835299000

Production Capacity

1000sets/Month

Key features

Multi-Point Calibration: Supports 4.01, 6.86, and 9.18 pH values for accurate probe calibration.

Long Shelf Life: Unopened powder lasts two years; opened solution usable for 3-6 months at 4-16C.

Versatile Applications: Ideal for food analysis, medical research, and biochemistry testing.

High Accuracy: Ensures electronic pH measurement probes maintain precision during long-term use.

Flexible Customization: Offers full, minor, and sample-based customization options for specific needs.

ISO9001 & CE Certified: Product meets international quality and safety standards for reliability.

Convenient Packaging: Bagged powder format with 3g weight per bag for 250ml standard solution.

Rapid Delivery: Average lead time within 15 workdays for both peak and off-peak seasons.

Company profile

Importers and ExportersFast DeliveryCustomization from SamplesOEM Services

Zhengzhou Wollen Instrument Equipment Co., Ltd.

Henan, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 3 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤3.11h

AI-Powered supplier vetting

SummaryThe supplier is a limited company focused on laboratory instruments, including reactors, incubators, rotary evaporators, and circulating baths. It reports extensive customization, ODM, and OEM capabilities, while export sales represent 90% and markets span multiple regions. Production evidence includes 800 rotary evaporator sets annually and stated peak and off-season lead times of within 15 working days. However, the supplier reports only two employees, fewer than five quality-control staff, one year of R&D engineer experience, no new products in the past year, and no 3D design or SDK capability. After-sales and quality-management documentation is weak or unavailable: there are no written complaint-handling or corrective-action procedures, no overseas service infrastructure, and quality assurance status is unknown. Financial records are identified for 2020–2022, but no assessable financial results are provided.

Supplier typeThe supplier is a limited company that produces and sells laboratory instruments, with self-operated import/export rights and 90% of sales from exports. Its product range includes reactors, incubators, rotary evaporators, and circulating baths, indicating a manufacturer-oriented laboratory-equipment supplier.

After-Sales capabilityThe supplier has no overseas showroom, agents, branches, or reported offline trade-show participation. It also has no written complaint-handling or corrective/preventive-action procedures, although service quotations and payment terms are defined and service-capability assessment records exist without a written procedure.

R&D capabilityThe supplier states that it pursues continuous innovation and product expansion, and it provides ODM and OEM services. However, it reports no new products during the past year, no SDK, no 3D software design service, and only one year of R&D engineer experience, limiting evidence of current innovation strength.

Production capacityThe supplier reports annual rotary evaporator output of 800 sets and lead times within 15 working days in both peak and off-season periods. However, the reported total employee count is only two and quality-control staffing is fewer than five, so overall production scale and operational depth remain difficult to verify.

Customization capabilityThe supplier explicitly offers customization from samples and designs, full, minor, and flexible customization, as well as ODM and OEM services for popular brands. This is direct evidence of broad customization capability, despite the absence of 3D software design and SDK support.

Product Q&A

Q:What is the shelf life of the buffer powder?

Unopened powder has an expiration date of two years. Once opened, the solution should be used within 3-6 months when stored at 4-16C.

Q:How often should I calibrate my pH meter?

If the meter is in constant use, calibrate once a week. For normal frequency use, calibration is needed approximately every 3 months.

Q:What are the available pH values for this buffer powder?

The product provides calibration points at pH 4.01, 6.86, and 9.18.

Q:How do I prepare the calibration solution?

Each bag contains about 3g of powder which is mixed with 250ml of water to create a standard solution.

Q:What is the recommended calibration procedure?

Wash the electrode with pure water, immerse it in the solution, and adjust the meter. Start with 6.86, then use 4.01 or 9.18. Wipe the electrode between steps to avoid contamination.