Sweating Guarded Hotplate Status Quo

At present, sweating guarded hotplate you can see in foreign market are mainly from these two companies SGHP in NTNW and M259B in SDL ATLAS. They both entered Chinese market in the early stage and had wide application in some large institutes or labs; besides, they made some contributions to thermal and water vapor resistance test principle and methods.

NW SGHP sweating guarded hotplate adopts separation design structure thus the control box, water supplying tank and test unit are separated respectively; part of the sensor is external style. We should place test unit into the environment tank when testing, leaving water supplying tank and control box outside. Water and circular connection should be through the environment tank; the height of both test stand and water supplying tank can be adjusted manually. Ventilating system is equipped with 3 fans side structure so that wind velocity can be adjusted, but the 3 fans speed will also influence wind velocity stability. NW SGHP sweating guarded hotplate seems like a set of homemade test fixture for lab rather than a test device. It meets ISO11092 and ASTM F1868.

sweating guarded hotplate

SDL ATLAS M2598 adopts integral structure thus the test unit, control box, water flowing route and environment tank are like an integral machine. Test plate is copper grain structure, easy to be oxidized thus difficult to clean; according to customers’ response, when testing thin fabrics, the result sometimes appears negative data which is quite wrong to the actual situation; Wear made of these materials is much cold than wearing nothing. M2598 test speed is low and it takes at least 2 hours to test thick fabrics. The integral structure brings some problems such as the wind speed limited to 1m/s and environment temperature higher than 20 degree, so M2598 can only meet ISO11092 standard rather than ASTM F1868. 

QINSUN sweating guarded hotplate

Sweating guarded hotplate structure is complicated and requires high accuracy, thus manufacturing it needs difficult technology and higher cost, that’s why it is expensive, especially SGHP in NW whose price is too high for general entrepreneurs.

The above problems are main frustration of sweating guarded hotplate propaganda in China.

For latest news on sweating guarded hotplate and other textile testing instruments, please feel free to contact QINSUN Instruments--China professional textile testing instruments manufacturer.