P233A/F series Pressure Switch

Introduction

This (differential) pressure switch is used to sense flow of air, single or differential air pressure. Typical applications include:

- Detect clogged filter

- Detect frost or ice build-up on air conditioning coils

- Air proving in heating or ventilation ducts.

- Maximum airflow controller for variable air volume system.

- Detect blocked flue or vent

- Monitor fan operation

Description

This switch senses a change in the (differential) pressure (either velocity pressure or pressure drop across a restriction) as the airflow changes. The (differential) pressure is applied to the two sides of a diaphragm in the control. The springloaded diaphragm moves and actuates the switch. The series P233A/F can also be used to detect small positive gauge pressure by using only the high-pressure connection and leaving the low-pressure port open. Or to detect a vacuum by using only the low pressure connection and leaving the highpressure port open to ambient pressure.

Features

• One switch to measure relative pressure, vacuum or differential pressure
• Various accessories available
• Compact and durable construction
• Easy mounting and wiring, various mounting possibilities
• Standard PG 11 nipple and optional DIN 43650 connector
• Accurate and stable switch point
• SPDT contact standard