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The German FEMA pressure switch DWR16-301 is a high-quality, precision instrument designed for monitoring and controlling pressure in various industrial and hydraulic applications. It is renowned for its robust construction, reliability, and accuracy.
**Technical Parameters:**
* **Model:** DWR16-301
* **Manufacturer:** FEMA (Germany)
* **Switch Type:** Pressure switch with a micro switch.
* **Pressure Connection:** G 1/4 B (external thread) or other variants as per specific model.
* **Electrical Connection:** Typically a standard terminal box or plug connection.
* **Setting Range:** The adjustable pressure range is a key specification, for example, commonly spanning from a low minimum (e.g., 1 bar) to a high maximum (e.g., 400 bar or more, depending on the specific version). The exact range must be confirmed from the specific product datasheet.
* **Switching Differential:** Hysteresis is adjustable. The range for adjustment varies by model.
* **Electrical Rating:** The micro switch is rated for specific loads, such as 10(4)A 250V AC or 5A 400V AC, for resistive loads. Ratings for DC and inductive loads are typically lower.
* **Pressure Media:** Compatible with standard hydraulic oils, compressed air, and water, depending on the seal materials.
* **Housing Material:** Typically a robust, corrosion-resistant material like die-cast aluminum with a protective coating.
* **Pressure Element:** A precision piston sensing system.
* **Protection Class:** Commonly IP65, ensuring protection against dust and water jets.
* **Operating Temperature Range:** Suitable for a wide ambient temperature range, for example -25°C to +80°C.
* **Repeatability:** High repeat accuracy, typically within ±1% of the set value.
**Description:**
The FEMA DWR16-301 is a compact and versatile pressure switch engineered for demanding environments. Its core function is to open or close an electrical circuit when a pre-set fluid or gas pressure is reached. The device features a clearly visible, robust setting scale with a knurled adjustment knob, allowing for precise and easy calibration of the switch point without the need for tools in many cases.
The internal mechanism is based on a piston sensor, which provides excellent resistance to pressure peaks and ensures long-term stability and a long service life. The switching differential (h
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