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Allen Bradley 840 Switches 840-4A1

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840-4A1

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The 840-4A1 by Allen Bradley operates as an automatic float switch designed for various water level monitoring applications. It functions effectively within a specified temperature range and features a robust enclosure for outdoor use.

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Ships from Raleigh, NC
2 Year DO Supply Warranty
Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 840-4A1

ManufacturerAllen Bradley
Product TypeAutomatic Float Switch
Product Line840 Switches
Part Number840-4A1
Weight4.50 lbs (2.04 kg)
UPC781180908262
Enclosure TypeType 1 Enclosure
Mounting TypeBase Mounted
Lever TypeDouble Arm Lever
Pulley TypeSingle-Sheave Wheel
Minimum Operating Temperature-30°C
Maximum Operating Temperature66°C
Relative Humidity5 to 95% (non-condensing)
Installation Altitude1000 m
Minimum Storage Temperature-30°C
Maximum Storage Temperature93°C
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The 840-4A1 automatic float switch from Allen Bradley demonstrates reliable performance across diverse operating conditions. Housed in a Type 1 enclosure, this switch holds up well in general environments, making it suitable for various applications involving liquid level detection.

The float switch employs a robust base-mounted setup, ensuring stability upon installation. A double arm lever mechanism facilitates the activation process, while the single-sheave wheel pulley enhances operational efficiency. With a minimum operating temperature of -30°C and a maximum of 66°C, the unit is engineered to perform in a broad temperature spectrum.

This switch also functions within relative humidity levels ranging from 5% to 95%, provided the conditions are non-condensing. It can be installed at altitudes reaching 1000 meters, broadening its application possibilities. For storage, the switch remains functional in temperatures as low as -30°C up to 93°C. Overall, the Allen Bradley 840-4A1 serves as a versatile and dependable solution in liquid level monitoring tasks.