Airflow MkII
Fixed point anemometer for tunnels
The AIRFLOW MkII is a robust, single point monitor designed to measure air velocity (and temperature when specified) within a tunnel environment.
Airflow MkII
Using proven, ultrasound time of flight technology ensures the AIRFLOW MkII provides consistent and accurate measurements. The data provided by the AIRFLOW-MkII can be used as part of an air quality management system within a tunnel or other confined spaces including rail and cable tunnels and mining applications.
The AIRFLOW-MkII has no moving parts and no regular service requirements, making it a truly fit and forget monitor. With industry standard SCADA / PLC interface options, such as Current Outputs, Digital Relays and RS485 (Modbus RTU) the AIRFLOW-MkII is a self-contained, intelligent, tunnel airflow monitor.
Features
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Proven short path ultrasound measurement technique using time of flight differential
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No moving parts, wear items or other components that require routine replacement
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Self-contained single component instrument
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Optional pre-calibrated temperature measurement
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Intelligent analyser with a range of industry standard outputs
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24 month warranty - optional warranty extensions available
Benefits
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Plug and socket connectors simplify the installation and reduce the amount of wiring required
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Easy to install with no alignment or interconnection required
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Provides accurate readings which are unaffected by temperature, pressure or humidity
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Long service intervals with no drift and low maintenance requirements
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IP67 rated and designed specifically for use in harsh tunnel environments
Specification
Airflow Measurement
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
1 | Measuring Principle | Ultrasonic transit time | |||
2 | Measurement Range |
m/s mph |
-60 -134 |
+60 +134 |
User selectable (also available as ft/min or kph) |
3 | Resolution | m/s | 0.01 | Display resolution | |
4 | Accuracy |
m/s % |
-0.1 -2 |
+0.1 +2 | Relative to reading |
5 | Damping | seconds | 1 | 100 | Response time ~3x damping |
Temperature Measurement
(AIRFLOW-T only)
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
6 | Measuring Principle | RTD | |||
7 | Measurement Range | °C | -20 | +70 | User selectable (also available °F) |
8 | Resolution | °C | 0.1 | Display resolution | |
9 | Accuracy | °C | -0.5 | +0.5 | |
10 | Damping | Seconds | 1 | 100 |
User selectable (response time~3x damping) |
Power
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
11 | Voltage | Vdc | +24 | ||
12 | Voltage Tolerance | % | -10 | +10 | |
13 | Nominal Current Consumption | mA | 200 | ||
14 | Power Up Current Consumption | mA | 200 |
Interface Options
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
15 | Serial Outputs |
Modbus RTU via RS485 External USB | |||
16 | Analogue Outputs (two or four) | mA | 0 /2 /4 | 20 | Isolated and scalable (user selected) |
17 | Digital Relay Contacts (five) | A | 0 | 3 | @30Vdc (signal level and data vaild) |
Physical
No. | Parameter | Units | Min | Max | Comment |
---|---|---|---|---|---|
18 | Ingress Protection | IP67 | |||
19 | Operating Temperature | °C | -30 | +70 | |
20 | Operating Humidity | % | 100 | ||
21 | Operating Pressure | hPa | 600 | 1300 | |
22 |
Materials Enclosure Transceiver |
AISI/SAE 316L Stainless steel Flame retardant UL rated polycarbonate | |||
23 | Dimensions | mm | 220 x 240 x 160 | ||
24 | Weight | kg | 3.5 | ||
25 | Regulatory Compliance |
2014/20/EU (Electromagnetic Radiation) 2014/35/EU (Low Voltage) | |||
26 | Design Life | Years | 20 | ||
27 | MTBF | Years | >20 | ||
28 | Warranty | Months | 24 | Return to base warranty. Extensions available |
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