Order & Inquiry Guidelines

We kindly ask you to review the following before placing an inquiry or order.

Custom design, no stock. SINOMAS is a custom heating solution provider. All products are manufactured to your specific requirements. We do not maintain stock unless a blanket order or demand forecast has been agreed in advance.

Specifications are application-dependent. Technical specifications listed on this website — including maximum watt density and operating temperature — are tested under defined conditions. Please consult us to confirm suitability for your specific application.

Samples and prototypes. Standard samples representing our materials and construction are available upon request. Prototypes built to your specific design require a custom development process and will be quoted separately.

Drawing approval before production. Once all technical details are agreed, we will provide a drawing for your review and written approval. Production will not commence until the drawing has been formally approved.

Payment in advance. As all products are custom-manufactured to your specifications and cannot be repurposed for other customers, we require full payment prior to production.

Wattage selection. It is your responsibility to determine the wattage requirement for your application. We are happy to assist with guidance, but final selection remains with the customer.

Lead time. Lead time varies by product complexity and order volume. A typical production lead time is 3–5 weeks after drawing approval and receipt of payment. Where products include special connectors and/or temperature sensors, lead time may be subject to component availability from our suppliers and cannot always be promised in advance. We will provide the best estimate available at the time of order acknowledgement.

Agency approvals. We hold UL, CE, RoHS and REACH approvals at the product category level — for example, silicone rubber heaters, polyimide heaters, and so on. Obtaining separate agency approvals for individually customized designs is generally not cost-effective and is not included as standard. Please discuss your compliance requirements with us at the inquiry stage.

Product warranty. Products are warranted for one year from the date of delivery. Our liability is limited to free replacement of defective goods. The warranty does not cover damage resulting from improper installation, operation outside specified parameters, or unauthorized modification.