Import Differential Pressure Switch Cs-111 — Buy in wholesale FOB from Supplier in China

The Differential pressure switch CS-111 is a mechanical switching device designed for monitoring pressure differentials in industrial fluid systems, particularly in power plant applications. It operates within a range of 0.5 to 50 kPa, with a setpoint accuracy of ±1.5% of full scale and a hysteresis of 2% to 5%. The housing is constructed from die-cast aluminum with an IP65 rating, and the internal diaphragm is made of 316L stainless steel for corrosion resistance in humid or chemically exposed environments.

This model is typically used in boiler air flow control, fan monitoring, and dust collection systems where consistent differential pressure triggers alarms or shutdowns. It does not include electronic displays or digital outputs, relying instead on a single SPDT mechanical contact rated for 250 VAC at 5 A. The connection ports are 1/2 NPT female threads, standard for industrial piping in Chinese and North American systems. The unit is calibrated for ambient temperatures between -20°C and 60°C and meets IEC 60068-2-14 for thermal shock resistance.

Buyers in power generation, cement manufacturing, and HVAC system integration commonly source this switch for retrofitting older turbine control panels. It is sold in bulk quantities of 10 units per carton, with each unit individually wrapped in foam and packed in corrugated cardboard boxes. Lead times are typically 4 to 6 weeks ex-factory, and shipping is arranged under FOB Deyang port. Buyers should confirm compatibility with existing control circuits before ordering, as no built-in override or manual reset is provided.

Dongfang Yoyik Engnieering Co., Ltd. is based in Deyang, Sichuan, and operates as a supplier of industrial instrumentation and non-standard mechanical parts for thermal power plants. The company does not publish its founding year, employee count, or annual turnover. Its listing indicates direct production capability through the inclusion of proprietary part numbers such as CS-111-DF and ZYR-DFYL-2025-1-21, suggesting in-house assembly and testing. It has no verified certifications listed, and its response rate is currently unrecorded, indicating no recent buyer inquiries have been processed.

The supplier focuses on components used in turbine control, LVDT systems, and pressure monitoring, with a product catalog that includes over 30 distinct sensor and switch models. It does not claim ISO certification, export experience, or client references. All products appear to be sourced or manufactured locally in Sichuan, with no evidence of foreign partnerships or OEM agreements. Buyers should treat this as a direct manufacturer with limited digital engagement and no public quality documentation.