DANFOSS 061B110566 Bellows Type Pressure Switch (-0.20 to 1.00 bar)

Product Overview

The 061B110566 (061B110566) is a heavy-duty industrial pressure switch from Danfoss, engineered for precise regulation and monitoring of liquid and gaseous media. This specific model features a high-sensitivity bellows sensing element, allowing it to operate within a specialized low-pressure range of -0.20 to 1.00 bar. Designed for reliability in demanding environments, the 061B110566 provides a robust mechanical switching solution for vacuum control, low-pressure gas monitoring, and pump protection systems. With its IP65 enclosure rating and durable construction, this unit ensures fail-safe performance and long-term setpoint stability in sectors such as water treatment, marine engineering, and power generation.

Technical Configuration

The 061B110566 utilizes a refined mechanical architecture to deliver accurate switching in low-pressure applications:

• Bellows Sensing Element: The internal bellows (indicated by code 1) provides superior sensitivity and repeat accuracy compared to piston-type switches, specifically optimized for detecting minute pressure changes.

• Specialized Setting Range: Configured with a unique setting range (-0.20 to 1.00 bar Pe), making it ideal for vacuum monitoring or low-pressure threshold detection.

• High Maximum Pressure: Despite its low switching range, the unit maintains a high maximum permissible pressure (Pe) of 15.0 bar, protecting the internal mechanism from unexpected system surges.

• Industrial Connectivity: Equipped with a standard G-type (BSP) pressure connection for secure mechanical fitting and a Pg 11 electrical entry for reliable wiring.

• Environmental Protection: The housing achieves an IP65 rating, offering total protection against dust and low-pressure water jets, ensuring durability in wash-down or outdoor environments.

Technical Specifications

Technical FAQs

Can this switch be used for vacuum applications?

Yes. With a setting range starting at -0.20 bar, the 061B110566 is capable of monitoring partial vacuum levels, making it suitable for vacuum-assisted priming systems or intake manifold monitoring.

What is the benefit of the bellows sensing element in this model?

The bellows design offers a higher surface area for pressure detection compared to other mechanical types. This results in much higher precision and a smaller differential when working with the low-pressure increments required by the -0.20 to 1.00 bar range.

How do I adjust the setpoint?

The setpoint is adjusted via the internal range screw. Because this model uses a bellows system, always use a calibrated low-pressure gauge during commissioning to ensure the switch activates precisely at the required vacuum or pressure threshold.

Engineering & Installation Guide

• Pulsation Protection: Although the unit has a high Pe of 15.0 bar, continuous pressure pulsations can lead to bellows fatigue. If installed near a pump or compressor discharge, use a capillary tube or a pressure snubber to dampen the pulses and extend the switch's operational life.

• Mounting and Vibration: To ensure the highest accuracy of the setpoint, mount the 061B110566 on a rigid, vibration-free surface. If the installation point is subject to high mechanical vibration, use a flexible pressure hose to isolate the switch from the vibration source.

• Wiring for IP65 Integrity: To maintain the IP65 rating, ensure the Pg 11 cable gland is tightened correctly around the cable. Always install the switch with the cable entry pointing downwards to prevent moisture from traveling along the cable and entering the electrical compartment.