As an ISO 9001 certified Chinese air fryer manufacturer, SINREEN provides 3,000+ free test samples to global buyers every year.
According to our 2023 customer survey data, 92% of wholesale customers believe that sample testing is the core decision-making link in selecting suppliers. This article will fully disclose our sample service system to help you verify the product strength with zero risk.

1. Answers to 8 key questions about SINREEN sample service
Q1: Do you provide product samples?
We provide three types of sample solutions for B2B customers:
Standard prototype: Free application for existing models (customers with MOQ of 100 units or more);
Customized prototype: Pay 30% development fee (can be deducted from subsequent orders);
Competitive product comparison package: Contains models with the same parameters from 3 manufacturers (NDA must be signed).
Q2: Sample application process
4-step express channel (completion in an average of 3 working days):
Submit the form on the official website → Account manager matches the model → Sign the sample agreement →DHL/FedEx global direct delivery;
Case: Through this process, a Spanish kitchenware importer only took 5 days from application to receiving 6 prototypes, which is 60% shorter than the industry average cycle.
Q3: Fee policy
First-time customer: prepay 20% sample fee (full refund for large orders of $10K);
Strategic customer: enjoy permanent free sample fee for annual purchases exceeding $50K;
Special note: bear all international shipping costs for samples (2024 promotion policy).

2. Sample quality control system
2. Sample quality control system
Q4: Consistency between samples and mass production
We adopt a triple verification mechanism:
Same production line principle: The prototype and mass production machines share the production line number;
Limit test report: Each prototype comes with 48 hours of continuous working test data;
Parts traceability: The core parts supplier information can be queried through the QR code.
Measured data comparison:
Heating speed: 92 seconds to 200℃ ±3 seconds
Noise value: ≤65dB±2dB
Power consumption: 0.85kW·h/time/±0.03kW·h
3. Sample evaluation and feedback closed loop
Q5: List of recommended test items
We provide the “25-item Evaluation Guide for Commercial Air Fryers”, including:
Performance test: Analysis of temperature control curves for continuous operation for 8 hours;
Compatibility test: Comparison of cooking efficiency in different altitudes (with altitude simulation scheme);
Cleaning test: Scratch resistance verification of NSF-certified food-grade coatings in the United States.
Q6: Dissatisfaction improvement mechanism
Customers can submit improvement requirements through the following channels:
Online engineering collaboration platform: Real-time upload of test videos/data;
Priority response level: VIP customer requirements will be resolved within 72 hours;
Case: Brazilian customers proposed the requirement of “adding Portuguese operation interface”, and we completed the firmware upgrade in 14 days.

3. Sample evaluation and feedback closed loop
Q5: List of recommended test items
We provide the “25-item Evaluation Guide for Commercial Air Fryers”, including:
Performance test: Analysis of temperature control curves for continuous operation for 8 hours;
Compatibility test: Comparison of cooking efficiency in different altitudes (with altitude simulation scheme);
Cleaning test: Scratch resistance verification of NSF-certified food-grade coatings in the United States.
Q6: Dissatisfaction improvement mechanism
Customers can submit improvement requirements through the following channels:
Online engineering collaboration platform: Real-time upload of test videos/data;
Priority response level: VIP customer requirements will be resolved within 72 hours;
Case: Brazilian customers proposed the requirement of “adding Portuguese operation interface”, and we completed the firmware upgrade in 14 days.
4. Get your test sample now
SINREEN 2024 sample support plan:
✅ First-year cooperative customers enjoy 3 free standard sample quotas
✅ Bulk purchasing customers can apply for on-site test engineer support
✅ Customers participating in the product improvement plan enjoy exclusive price protection terms
Take action now: 📞 Exclusive consultant consultation: 0086 158 0408 8099