Maintenance free flow sensor for air and gases with high temperature, highly responsive from 0.2 m/s.
Measurement of flow velocity and / or volume flow at higher temperatures up to +350 °C is very important in many applications with regard to energy efficiency, quantity detection and system control. Accordingly the requirements for a stationary flow sensor are very high.
• Chamber head (fast response time)
• Flow and temperature signal
• Probe length 250 … 1,000 mm
• Remote sensor (optional)
• Measuring ranges 0 … 2.5 m/s to 0 … 60 m/s
• Pulse output
• Profi-BUS DP-V0 and DeviceNet (optional)
• Pressure resistant up to 16 bar
• Temperature range +350 °C
In many areas the measurement of the flow velocity and / or the volume flow at higher temperatures of up to +350 °C is very important in terms of energy efficiency, quantity detection and plant control.
Mechanically rugged, precise and long-term stable measurement values as well as different installation sites
• Drying processes
• Engine test stands
• Industrial burners
• Control of the combustion air
| Humidity | Measuring mode: Non-condensing (< 95 % RH); high relative air humidity in combination with high temperature can cause measurement deviations |
| Operating pressure (max.) | Atmospheric (700 … 1,300 hPa) / 16 bar (optional; over pressure) |
| Display | 4 x Duo-LEDs (green / red / orange) |
| Supply voltage | 24 V DC ± 20 % |
| Current consumption | Typ. 50 mA (max. 250 mA) |
| Start up time | Approx. 10 s after switch-on |
| Analog outputs for wN and TM (type: Auto U / I) |
Auto-U/I: 0 … 10 V / 4 … 20 mA (signal characteristic depends on RL) Voltage output: RL ≥ 550 Ω (short-circuit protected) Current output: RL ≤ 500 Ω Change-over hysteresis: 50 Ω CL ≤ 10 nF |
| Pulse outputs: Signalization | 0 … 100 Hz or 1 impulse / m3 or free selectable frequency (10 … 100 Hz) |
| Pulse outputs: Technology | 1. Highside-driver (open collector at protected supply voltage; not galvanically isolated) High level: > supply voltage – 3 V 2. Semiconductor relay (galvanically isolated), max. 30 V / 50 mA |
| Fieldbus (optional) | Profibus DP / DeviceNet |
| Electrical connection | Plug-in connector M12 (A-coded), male, 8-pole (shielded), screwed |
| Maximum cable length | Voltage interface: 15 m Current interface (pulse outputs): 100 m |
| Mounting position | Arbitrary (atmospheric; under higher pressure preferred horizontally) |
| Mounting tolerance | ± 3° relative to flow direction |
| Type / class of protection | IP65 (housing), IP54 (probe) / III (SELV) or PELV (EN 50178) |
| Probe length | 250 / 400 / 600 / 1,000 mm (for both: compact probe and remote probe) |
| Weight | 550 g max. (400 mm input length) / 800 g (field bus version) |
| Cable length (remote version) | Selectable: 1 … 10 m (in steps of 1 m) |
| Measuring quantity | Standard flow velocity wN, based on standard conditions 1) Medium temperature TM |
| Measured medium | Clean air, nitrogen, other gases upon request |
| Measuring range flow wN | 0 … 10 / 20 / 40 / 60 m/s |
| Lower detection limit flow wN | 0.2 m/s (at TM = 20 °C) |
| Measuring range temperature TM | 0 … +200 / +350 °C |
| Recovery time wN | < 10 s (after temperature change of ∆ϑ = 40 K and at wN = 5 m/s in air) |
| Operating temperature | |
| Sensor head | 0 … +200 / 0 … +350 °C (optional) |
| Electronics | -20 … +70 °C |
| Storage temperature | -20 … +85 °C |
| Material | |
| Housing | Aluminium, anodised |
| Sensor tube | Stainless steel 1.4571 |
| Sensor head | Platinum resistor element (glass-passivated), ceramics |
| Compression fitting | Stainless steel 1.4571 or brass (depending on sensor option) |
| Measuring accuracy | |
| Standard wN | ± (3 % of measured value + [0.4 % of fmr; min. 0.08 m/s]) 1) |
| High precision (optional) wN | ± (1 % of measured value + [0.4 % of fmr; min. 0.08 m/s]) 1) |
| Response time (t90) wN | 3 s (jump of wN from 0 to 5 m/s in air) |
| Temperature gradient wN | < 8 K/min (at wN = 5 m/s in air) |
| Temperature TM (wN > 2 m/s) | ± 2 K (TM = 10 … 30 °C) ± 4 K (in remaining measuring range) |
| 1) Standard velocity wN based on standard conditions of 20 °C and 1,013.25 hPa, related to adjustment reference; fmr = final measuring range Subject to technical changes. | |
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