The propeller sensor from Chauvin Arnoux, type P01654251, is a replacement sensor for the thermo-anemometer C.A 1227 and is used for precise measurement of air velocity and air volume flow. It features an optically scanned propeller system that detects air flow and converts it into measurable values. The design with a separate sensor and spiral cable enables flexible and comfortable handling, especially in tight or hard-to-reach spaces. The sensor is suitable for use in various technical and industrial application areas where accurate air flow analysis is required.

Applications

The sensor is primarily used in ventilation and air conditioning system monitoring, in building technology, and in industrial process monitoring. It enables the measurement of air velocities in ducts, channels, or open spaces. The ability to directly measure air volume flow makes it particularly useful for checking ventilation systems, filters, or determining air exchange rates in rooms. The measurement is performed via a propeller with optical detection, which converts rotational speed into velocity values.

Functions and Equipment in Detail

The sensor supports air velocity measurements in the range of 0.25 m/s to 35.0 m/s (equivalent to 49.0 to 6890.0 fpm). The accuracy is ± 3 % of reading ± 0.1 m/s, ensuring high measurement reliability. For air volume flow, a range of 0 to 2,999 m³/h is specified, with an accuracy of ± 8 % of reading. Additionally, the sensor measures ambient temperature in the range of -20 °C to +50 °C (equivalent to -4 °F to +122 °F), with temperature accuracy of ± 0.8 °C (at 0 to 50 °C) and ± 1.6 °C (at -20 to 0 °C). Integrated functions include Min, Max, HOLD, and average value functions, enabling quick analysis of measurement data.

Technology Explained Simply

The optical detection of the propeller works via a light sensor system that detects the rotation of the propeller and converts it into electrical signals. These signals are then converted into velocity and volume flow values. The measurement is contactless and non-touch, ensuring high reliability and longevity. The spiral cable, with a length of 24 to 120 cm, allows flexible positioning of the sensor independent of the main device. Power supply is via 3 alkaline batteries (LR6) or rechargeable NiMH batteries. Optionally, the device can be connected via a power adapter or micro USB. The autonomy is 200 hours in portable mode or 8 days with recording at a 15-minute interval.

Compatibility and Accessories

The sensor is specifically developed for the thermo-anemometer C.A 1227 and replaces the original propeller sensor. It is compatible with the device and can be used as a replacement or additional sensor. Available accessories include a quick charging set (charger with 4 NiMH batteries), the DataView software, a multi-purpose magnetic holder (Multifix), a transport case, a transport bag (120 x 245 x 60 mm), a USB power adapter, a shock protection sleeve with Multifix, and a Bluetooth BLE / USB modem for PC. These accessories support the functionality and use of the device in various environments.

Installation and Mounting

The sensor is mounted by connecting it to the main device via the spiral cable. Sensor positioning depends on the measurement task – for example, in ventilation ducts, channels, or rooms. The flexible cable connection allows easy placement. The device itself features a magnetic holder and a slot for wall mounting, ensuring secure and stable installation. Operation is performed via the main device, with measurement values displayed directly on the screen.

Operational Advantages

The sensor offers high measurement accuracy and reliability for capturing air velocity and volume flow. The optical scanning of the propeller ensures long-lasting and low-maintenance technology. The large memory capacity of over one million measurement points enables extensive data logging. The combination of portable design and flexible cable connection makes the sensor particularly suitable for mobile applications. Compatibility with various accessories expands usage possibilities and supports efficient data processing.

Protection Rating and Operating Conditions

The sensor housing has a protection rating of IP40, meaning protection against solid objects larger than 1 mm and against splashing water from any direction. The operating temperature ranges from -10 °C to +60 °C, with relative humidity from 10 to 90 %. Compliance with standards IEC 61010-1 and IEC 61326-1 is given, ensuring safety and functionality in industrial use. The sensor dimensions are 160 x 80 x 38 mm, the housing 150 x 72 x 32 mm. The total weight is approximately 400 g.

Accessories and Software

In addition to the sensor, various accessories are available to extend functionality. The DataView software enables evaluation and display of stored measurement data. The Bluetooth BLE / USB modem for PC enables wireless or wired data transfer. The transport bag and transport case provide protection during storage and transport. The quick charging set with 4 NiMH batteries and charger supports use with rechargeable batteries. The shock protection sleeve with Multifix offers additional protection and flexible mounting options.

Compliance with Standards

The device complies with standards IEC 61010-1 (safety of electrical measuring instruments) and IEC 61326-1 (electromagnetic compatibility for measuring, control, and monitoring equipment), ensuring reliability and safety in industrial applications. Compliance with these standards is essential for use in technical and industrial applications.

Practical Use

In practice, the sensor is frequently used in building and plant monitoring to check the efficiency of ventilation and air conditioning systems. The ability to directly measure air volume flow is particularly useful for determining air exchange rates in rooms. The logging function enables documentation of measurement values over extended periods, which is important for quality control and maintenance planning. The combination of mobile use and high measurement accuracy makes the sensor a reliable tool for professionals in building and process monitoring.