Air Flow Velocity Transmitter 985V

Product Details:

Sensor Type Hot film anemometer
Temperature Range -10C to +50C
Flow Rate Air velocity (m/s)
Measurement Range 0 - 10 m/s
Current Range 4-20 mA
Humidity % 0 to 95% RH
Connectivity Type Analog output (0-10 V/4-20 mA)
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Air Flow Velocity Transmitter 985V Product Specifications

Wind Speed 0 - 10 m/s
Power Consumption Max. 2 W
Humidity % 0 to 95% RH
Connectivity Type Analog output (0-10 V/4-20 mA)
Resolution 0.01 m/s
Equipment Type Air Flow Velocity Transmitter
Accuracy 3% of measuring value
Flow Rate Air velocity (m/s)
Measurement Range 0 - 10 m/s
Material ABS plastic housing
Current Range 4-20 mA
Temperature Range -10C to +50C
Range 0 to 10 m/s
Sensor Type Hot film anemometer
Display Type LCD digital
Power Supply 24 V DC

Product Description

The transmitters of the 985V series are used to measure volume flow or flow velocity and pressure. A jumper enables switching between volume flow or flow velocity and pressure measurement.

Applications :

Building automation and air conditioning systems
Overpressure measurement in clean rooms and laboratories
Measurement of constant pressure in VAV applications
Dynamic filter and ventilator monitoring

Technical Data :

985VM with manual offset calibration

Setting ranges:
Depending on type between 0 Pa and 100 mbar
Temperature range:
Working and storage temperature from 20C to +70C
Process connection:
Hose connection with 4 / 6 mm outer diameter
Supply voltage:
18 to 30 VAC / VDC
Output signal:
0 10 V
4 20 mA
Electrical connection:
Plug-in terminals for wires and strands up to 1.5 mm2 or
circular connectors M12 / 4-pole
Protection class:
IP65 acc. to EN 60529

985VA with automatic offset calibration

Setting ranges:
Depending on type between -100 Pa und 1 bar
Temperature range:
Working and storage temperature from 10C bis +50C
Process connection:
Hose connection with 4 / 6 mm outer diameter
Supply voltage:
18 to 30 VAC / VDC
Output signal:
0 10 V
4 20 mA
Electrical connection:
Plug-in terminals for wires and strands up to 1.5 mm2 or
circular connectors M12 / 4-pole
Protection class:
IP65 acc. to EN 60529

Versatile Air Velocity Measurement

The 985V Air Flow Velocity Transmitter excels in delivering precise airflow readings from 0 to 10 m/s, making it ideal for HVAC, cleanroom, and general air quality monitoring. Its hot film anemometer sensor ensures dependable measurements in varying environments with rapid response.

Easy Integration and Installation

This model supports both 420 mA and 010 V analog outputs, allowing seamless connection to most control systems. Its duct-mount design and lightweight, durable build (ABS housing, 180 grams) simplify setup and maintenance in a wide range of applications.

Reliable Performance and Compliance

Factory calibrated, CE certified, and featuring an IP54 enclosure, the 985V is engineered for reliability and longevity. The LCD digital display and LED operation indicator ensure straightforward usage and continuous system status monitoring.

FAQs of Air Flow Velocity Transmitter 985V:

Q: How is the Air Flow Velocity Transmitter 985V typically installed?

A: The 985V transmitter is designed for duct mounting. Simply insert its 200 mm probe into the airstream of your duct system and secure the housing to the ducts exterior. Ensure proper electrical connections for the selected analog output (420 mA or 010 V) and power supply (24 V DC).

Q: What applications can benefit from using the 985V transmitter?

A: This transmitter is ideal for HVAC systems, cleanroom environments, and air monitoring applications where accurate airflow measurement is critical. Typical locations include air handling units, ventilation ducts, laboratory environments, and controlled manufacturing spaces.

Q: When should I calibrate or maintain the 985V unit?

A: The 985V comes factory calibrated, so no initial calibration is required. Maintenance typically involves periodic cleaning of the probe, especially in dust-prone environments. Annual functional checks are recommended for optimal accuracy.

Q: Where can the 985V transmitter be deployed?

A: It is best used inside ducts or air channels operating in atmospheric pressure conditions. The temperature range for operation is -10C to +50C, and it can be stored between -10C and +60C. Its IP54 rating makes it suitable for most indoor air monitoring scenarios.

Q: What is the process for switching output signal types?

A: The device features selectable analog output optionseither 420 mA or 010 V. Signal type selection is usually made via onboard jumpers or dip switches; refer to the products manual for the detailed procedure before connecting to your control system.

Q: How does the LED status indicator benefit users during operation?

A: The integrated LED provides clear visual confirmation that the device is powered and operational, aiding in quick diagnostics during installation and routine checks without the need for external equipment.

Q: What are the advantages of using a hot film anemometer sensor in this transmitter?

A: A hot film anemometer enables precise and rapid detection of air velocity changes with high resolution (0.01 m/s). This technology is less prone to drift and provides stable operation across a broad humidity range (095% RH), making it dependable for continuous monitoring.

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