SJE-Rhombus (S. J. Electro Systems, Inc. ) was founded on July 2, 1975 by Steve Johnston. Over 40 years later, SJE-Rhombus has grown into a leading manufacturer of reliable, trouble-free liquid level controls for the water, wastewater and sewage industries throughout the United States and Canada, as well as into global markets. 

SJE-Rhombus offers a wide variety of control products for residential, commercial, municipal, and industrial markets. From control panels utilizing embedded circuit board technology, to complete control and monitoring systems designed and built to individual specifications, SJE-Rhombus represents the most reliable integration of engineering and manufacturing capabilities in the industry. 

SJE Rhombus Suzhou factory is 100% subsidiary company of SJE Rhombus. We offer a wide variety of control products for residential, commercial, municipal, and industrial markets. We had ISO9001: 2008 certification, and UL, cUL, CSA, TUV, CE certification. From float switches, alarms, control panels to complete control monitoring systems designed and built to individual specifications, SJE-Rhombus represents the most reliable integration of engineering and manufacturing capabilities in the industry. 

New product desgins endure extensive in-house and field testing before submittal to recognized independent laboratories for safety testing and approval (UL, cUL, CSA, CE). Each product is constructed of materials of the highest quality with expert workmanship and delivered in responsive lead times. This commitment to quality ensures you a dependable, trouble-free product. 

1) Can I have some samples ?
Yes ,we can send you samples for testing,contact us for details

2)  What's delivery time ?
For standard product ,it usually takes about 7 working days;
For non-standard,it usually takes 30 days ,please contact us for details;

3) Can I do OEM or ODM ?
Yes, we have our own engineering team and we do accept OEM and ODM,but there is ordering quantity requirement;

4) How does your factory do the quality control ?
Our production process follow up the ISO standard and we control the product quality according to UL, CSA, TUV certification standard. All the manufacturing process are fully comply with SJE USA factory standard. 
 
5) What is the warranty ?
We provide 2 - Years Limitted warranty.