美国采购需求：空气质量监测器、室内空气质量测试仪、空气污染检测仪、空气质量传感器、空气质量计、空气质量测量工具

I'm reaching out to inquire about your wholesale pricing structure for your products. Specifically, I'd like to understand any tiered discounts you may offer based on order volume. It would be great to get insight into the pricing tiers and minimum order quantities, as this will help us plan our purchases more effectively. Additionally, any information on lead times and shipping options would be appreciated. Looking forward to your response!