RT 262A (060-313066) Danfoss Differential Pressure Switch

Product Overview

The RT 262A (060-313066) is an industrial-grade differential pressure switch designed for critical monitoring and control in heating, ventilation, and process air systems. Unlike standard pressure switches that measure pressure relative to the atmosphere, the Danfoss 060-313066 (060-313066) monitors the difference between two pressure points. This makes it an essential component for B2B applications such as filter monitoring, flow verification in ductwork, and pump control where maintaining a specific pressure drop is vital for system safety and efficiency.

Technical Configuration

Part of the renowned RT series, this switch is housed in a robust enclosure designed for longevity in demanding environments. It features a high-sensitivity SPDT (Single Pole Double Throw) contact system with a very tight contact differential of 0.1 bar, allowing for precise switching even with minor pressure fluctuations. The electrical interface includes a screwed cable entry with a professional metal cable gland, ensuring a vibration-resistant and moisture-tight connection. While it is built for high durability with a burst pressure of 42 bar, it is specifically designed for non-corrosive media (not for ammonia applications).

Technical Specifications

Technical FAQs

How does a differential pressure switch differ from a standard switch?

A standard switch has one pressure port and triggers based on the pressure rising above or falling below a setpoint relative to ambient air. The 060-313066 has two ports (High and Low) and triggers based on the difference ($\Delta P$) between those two specific points, regardless of the overall system pressure.

What are typical applications for the RT 262A?

It is commonly used to detect when an air filter is clogged (measuring pressure before and after the filter) or to ensure a pump is actually moving fluid by measuring the pressure across the inlet and outlet.

Is this switch suitable for outdoor installation?

Yes, the RT series typically features a high IP rating (IP66 with appropriate cabling) and is rated for temperatures as low as -25 °C, making it suitable for rooftops and unheated plant rooms.

Engineering & Installation Guide

• Port Identification: Ensure the "High" pressure line (upstream) is connected to the (+) port and the "Low" pressure line (downstream) is connected to the (-) port. Reversing these will prevent the switch from functioning correctly.

• Mounting Position: For maximum accuracy and to prevent condensate from entering the bellows, it is recommended to mount the RT 262A vertically with the pressure connections facing downwards.

• Electrical Wiring: Given the low contact rating (0.1 A), this switch is primarily intended as a pilot device. Use it to trigger a relay or provide a digital signal to a PLC rather than driving a motor or heavy load directly.

• Pressure Pulsation: If the system is subject to heavy pressure surges, it is a best practice to install a capillary tube or a pressure snubber to protect the internal bellows from mechanical fatigue.