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.
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) |
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| 26 | Design Life | Years | 20 | ||
| 27 | MTBF | Years | >20 | ||
| 28 | Warranty | Months | 24 | Return to base warranty. Extensions available |
Contact us
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