What is the minimum order quantity for custom equipment?

For non-standard test equipment, the minimum order quantity is 1 set. Each machine is built to order, so you can start with a single prototype line and expand later with the same design.

What is the shipping method and estimated time?

We ship by sea (FCL or LCL), air freight or international express depending on the size and urgency. Sea freight to most Asian ports takes 5-15 days, to Europe about 30-40 days; air freight is usually within 7-10 days worldwide.

Can we visit your factory before placing an order?

Of course. Customers are welcome to visit our Zhongshan factory to see the workshop, inspect machines under test and meet our engineers. For customers who cannot visit, we provide video factory tours and live testing demonstrations.

What payment methods do you accept?

We accept T/T bank transfer, and for small amounts we also support Western Union and PayPal. For new customers, we generally require 30% deposit and 70% balance before shipment; payment terms can be discussed for long-term partners.

News & Blog

Technical Insights 09/11/2026 Wanhe Testing 47 views

How to Choose a Temperature Humidity Chamber for Your Lab

A temperature humidity chamber is one of the most commonly used environmental test instruments. Here is what to check before you buy:

1. Temperature & Humidity Range

Most chambers cover -40℃ ~ 150℃ and 20% ~ 98% RH. Confirm the working range covers the requirements of your product standards.

2. Uniformity & Accuracy

±0.5℃ / ±2% RH accuracy is typical for home appliance testing. Larger chambers need special attention to uniformity.

3. Controller & Data Logging

A touch-screen programmable PID controller with USB data export simplifies compliance documentation.

4. Standards Compliance

Make sure the chamber meets IEC 60068 / GB/T 2423 test methods required by your customers.

Wanhe Testing supplies standard and custom temperature humidity chambers with factory calibration and global after-sales support.

FAQ

Frequently Asked Questions

Quick answers to common questions about our test equipment, customization, delivery and after-sales support.

Can you provide CE certification for the equipment?

Yes. The electrical system of each machine is CE compliant, and we can provide CE certificates and technical documentation. For machines used in certification testing, we also supply the calibration reports of the built-in instruments.

Do you accept L/C?

Yes, we accept irrevocable Letter of Credit (L/C) at sight for larger orders. Please provide your issuing bank details and we will confirm the terms with our bank.

Do you support testing according to our company-specific standards?

Yes. Besides international standards, we often build machines for enterprise internal standards and acceptance criteria. Share your standard documents with our engineers and we will implement the exact test methods and pass/fail thresholds.

Do you offer OEM/ODM branding on the equipment?

Yes. We can apply your brand name, logo, color scheme and controller interface language on the machines (OEM), or develop an exclusive design for your market (ODM). Tell us your branding requirements before production.

Can you develop fully customized test equipment for our specific test items?

Yes. We design and build non-standard test equipment from scratch — machines are drawn, engineered and manufactured for your exact test items, parameters, standards and production line layout, not modified standard products. Send us your test requirements and we will reply with a technical scheme within 3 working days.

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