Danfoss Bellows Pressure Switch 061B010266 IP65

Product Overview

The 061B010266 (061B010266) is a high-precision industrial pressure switch specifically engineered for low-pressure monitoring and vacuum control applications. Utilizing a sensitive bellows-type sensing element, this device excels in detecting minute pressure changes within a specialized range of -0.20 to 1.00 bar. Designed for the rigors of industrial automation, the 061B010266 provides critical safety and regulation feedback in boiler control systems, ventilation monitoring, and fluid management. Its robust construction is matched by an IP65 enclosure rating, ensuring the internal switching mechanism remains protected from dust and low-pressure water jets, thereby reducing maintenance-related downtime in demanding plant environments.

Suffix Breakdown

The model 061B010266 follows a structured technical logic to define its hardware characteristics:

• 0.6: Indicates a maximum working pressure (Pe) rating of 15.0 bar, allowing for significant system overpressure without instrument failure.

• 1: Specifies a Bellows-type pressure sensing element, known for high repeatability and sensitivity in low-pressure ranges.

• B: Denotes a G-type threaded pressure connection, compliant with standard industrial piping.

• 4: Represents a Pg 11 electrical connection size for secure cable entry.

• 66: Defines the specialized setting range of -0.20 to 1.00 bar, suitable for vacuum or atmospheric pressure control.

Technical Specifications

Technical FAQs

Can this switch be utilized for vacuum-break applications?

Yes. With a lower setpoint limit of -0.20 bar, the 061B010266 is perfectly suited for vacuum monitoring or ensuring a system maintains a slight positive pressure relative to the atmosphere.

How does the bellows element handle system pressure spikes?

While the operating range is low (up to 1.00 bar), the internal bellows is reinforced to withstand a maximum working pressure of 15.0 bar. This ensures that the switch will not be damaged or lose calibration during high-pressure system tests or unexpected surges.

What is the benefit of the IP65 enclosure rating?

The IP65 rating means the unit is dust-tight and protected against water projected from a nozzle. This makes it ideal for installation in humid mechanical rooms or areas subject to periodic wash-downs, preventing moisture from corroding the electrical contacts.

Engineering & Installation Guide

• Pulsation Damping: In systems where rapid pressure pulses or fluid hammers are expected, it is highly recommended to install the switch using a capillary tube or a pressure snubber. Direct exposure to high-frequency pulses can lead to bellows fatigue and premature failure of the switching mechanism.

• Mounting and Condensation: To prevent moisture or process condensate from accumulating in the bellows housing, mount the switch with the pressure connection pointing downwards. Ensure the Pg 11 cable gland is tightened to the correct torque to prevent moisture ingress through the cable jacket.

• Wiring for Safety: Ensure the electrical load does not exceed the contact rating (check nameplate for AC-1 vs AC-15 ratings). For fail-safe operations, utilize the SPDT (Single Pole Double Throw) contacts to trigger an alarm in the event of both overpressure and loss of signal.