Thermal flow sensor for uni- or bidirectional measurement of flow rate of air and gases with simultaneous detection of the flow direction in an explosive atmosphere (Zone 2).
- Thermopile head (very fast response time)
- Flow velocity and switching signals
- Probe length 130 … 300 mm
- Measuring ranges 0 … 1 m/s to 0 … 20 m/s
- Bidirectional measurement (optional)
- Detection of flow direction (optional)
- Sensor programming (optional)
- Cleanroom sensor
- Extremely compact (electronics is integrated in sensor tube)
- Sensor element protected against mechanical stress
- Linear analog output for measured flow velocity
- Two switching outputs to signal flow direction and threshold
- ATEX gases, zone 2: II 3G Ex nA IIC T4 Gc
- Laminar flow monitoring in cleanrooms
- Monitoring of overflow
- Cooling air monitoring
- Flow measurement in test benches
- Mass and volume flow measurement
Accessories
Connection technology
| Description | Article-Number |
|---|---|
| Connection cable with coupler socket, 5 m length, open cable ends, material PUR | 535 279 |
| Power supply unit: output 24 V / 1A DC, supply voltage 115/230 V AC (strip terminal) | 535 282 |
Mounting and fixing technology
| Description | Article-Number |
|---|---|
| Wall mounting flange, stainless steel 1.4571 | 520 181 |
| Compression fitting stainless steel, G½, atmospheric pressure | 532 160 |
| Wall mounting bracket, aluminium, anodized | 503 895 |
| Mounting flange, stainless steel 1.4404 | 551 740 |
| Assembly kit for pipe assembly suitable for MD 10.010/10.015 including pipe clamps and collar for adjustment to pipe diameter | 531 394 |
Measured value display
| Description | Article-Number |
|---|---|
| LED display MD 10.010 in wall housing to show volume flow and flow velocity, 85 … 250 V AC and sensor power supply | 527 320 |
| LED display MD 10.010, similar to 527 320 but with 24 V DC voltage supply | 528 240 |
| LED display MD 10.015, similar to 527 320 but with an additional sum function and a second measuring input | 527 330 |
| LED display MD 10.015, similar to 527 330 but with 24 V DC voltage supply | 528 250 |
Miscellaneous
| Description | Article-Number |
|---|---|
| Calibrator MK 40.415 - Set (8 / 12 / 16 mA) | 546 741 - 4 |
| Technical data | |
|---|---|
| Measuring quantity | Standard flow velocity wN based on standard conditions 1) |
| Measured medium | Clean air or nitrogen, additional gases on request |
| Measuring range wN | (±)0 … 1 / 2.5 / 5 / 10 / 20 m/s (uni- or bidirectional) |
| Lower detection limit wN | (±)0.05 m/s |
| Measuring accuracy | |
| Standard wN | ±(3 % of measured value + [2 % of fmr; min. 0.05 m/s]) 2) |
| High precision (optional) wN | ±(1 % of measured value + [2 % of fmr; min. 0.04 m/s]) 2) |
| Response time (t90) wN | 1 s (configurable: 0.01 … 10 s) |
| Operating temperature | |
| Sensor | 0 … +60 °C |
| Storage temperature | -20 … +85 °C |
| Material | |
| Sensor head | Stainless steel 1.4404 |
| Sensor tube | Stainless steel 1.4404 |
| Plug-in connector, nut screw | Stainless steel 1.4404 |
| General data | |
| Humidity | Measuring mode: Non-condensing (< 95 % RH) |
| Operating pressure (max.) | Atmospheric (700 … 1,300 hPa) |
| Supply voltage | 12 … 26.4 V DC |
| Current consumption | Typ. < 35 mA (max. 150 mA; including signal current of switching outputs) |
| Analog output wN | 0 … 10 V (RL > 10 kΩ; CL ≤ 10 nF; short-circuit protected) 4 … 20 mA (RL < 300 Ω; CL ≤ 100 nF) |
| Switching outputs | 2 x open collector (at GND), current-limited and short-circuit protected, configurable -Channel 1 (OC1): Flow direction or threshold value - Channel 2 (OC2): Threshold value - External switching voltage / current: Max. 26.4 V DC / 55 mA (typ. 50 mA) - Hysteresis: 5 % of threshold value (min. ±0.05 m/s) |
| Electrical connection | Plug-in-connector M9, male, 7-pin (shielded), screwed |
| Maximum cable length | Voltage interface: 15 m; Current interface: 100 m |
| Mounting position | Arbitrary |
| Protection type | Sensor probe: IP66 Plug-in connection: IP67 (with correct attached cable) |
| Protection class | III / PELV (EN 50178) |
| ATEX declaration | Gas (zone 2): II 3G Ex nA IIC T4 Gc |
| Probe length | 130/200/300 mm |
| Weight | Approx. 60 g max. (300 mm Sensor length) |
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