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For the best effect of your inquiry, please tell us the temperature or temperature range, bulb diameter and maximum length, capillary tube length, preferrably with your drawing and/or image of the product you need.
A capillary thermostat controls the temperature with a pressurised system that operates according to the principle of expansion of liquid. It comprises a temperature sensing bulb, a capillary tube and a diaphragm.
Following an increase in temperature at the bulb, the liquid expands in the capillary tube, causing the diaphragm to move. This movement activates a snap-action switch, causing opening or closing of switch contacts.
TOPRO capillary thermostats are characterized by accurate temperature control, reliable, small on/off temperatures difference, a wide range of temperature control and large over loaded current etc.
TOPRO can supply temperature controls, sensors and limiters with bulb and with capillary tube length according to customer specification for applications such as:
Electrical heating purposes
| Refrigeration industry
|


Dongguan TOPRO Electrical Technology Co., Ltd. has been a specialized manufacturer of bimetal thermal protectors, thermostats, relays and a solution provider of intelligent control, connection, protection, and sensoring fields since 2003.
During the period our business scope has also grown with the company and the times.
The fields of intelligent control, connection, protection and sensing are interconnected. Solutions of different projects may involve multiple fields.
In close cooperation with the customer we develop the optimum solution, providing the lowest cost products without compromising the quality and thus increasing your competitive advantage. Contact now and get our prompt reply!
Exceed customer expectation: We do the most homework to let the customers do the least. Our customers only need to do two things: to pay the money we deserve and to relax, and we do all the work.
It's not our slogon to keep customers satisfied, it's our promise and pratice.
We are committed to providing better service to customers than our competitors. If we don't, please let us know to surpass.
1. What is the MOQ?
The minimum order quantity of this product is generally 1000PCS. Unit prices vary with the order quantities. The lower the unit price will drop, the higher the order quantity is.
Considering the actual needs of customers, we do accept smaller quantity orders less than MOQ 1000PCS. For less than MOQ orders, higher unit price rates will apply.
2. What is your sample policy?
We offer samples for free on the condition that the buyer pays for the freight. The sample quantity is usually 3PCS, which is enough for testing. If more samples are needed, the customer may apply for more.
3. How to pay for the freight cost?
As we offer samples for free to show our sincerity for the business, the buyer is supposed to pay for the freight of sample delivery. The first priority choice of freight payment is the buyer's account for freight collect with DHL, FedEx, TNT, UPS and other international courier service providers.
If the buyer doesn't have any above-mentioned courier accounts, the buyer is supposed to prepay the freight cost that is quoted to and agreed by the buyer before sample preparation. We accept small amount payments by PayPal or T/T.
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