The smallest all-rounder – universal and powerful
- Patented sensor head (dumb-bell head):
- Largely independent from flow direction
- Easy to clean (free of undercuts)
- Dirt-resistant
- Flow and medium temperature signal
- Probe length 300 … 500 mm
- Measuring ranges 0 … 1 m/s to 0 … 20 m/s, special measuring range
- Optional coated (not for Hygienic Design version)
- Hygienic Design version optional
In many applications, the direct measurement of flow velocity or volume flow in air and gases is the ideal solution.
Due to high demands of modern control technology, the flow sensor has to detect precisely and fast an extremely wide measuring range from "almost zero" up to the maximum value.
For clean room applications also available as SS 20.250 Hygienic Design (order option):
- Smooth surface (free of undercuts) prevents product or dirt residues
- Corrosion resistant (stainless steel V4A)
- Easy to clean
- Resistant to all commercially available cleaning agents
- Easy to remove for calibration due to plug-in connection
- Sensor with 1.5 m Hygienic Design cable and plug
- Additional 10 m Hygienic Design cable with socket included
- Ventilation and air conditioning
- Clean room and pharma
- Monitoring of FFUs
- Monitoring of laminar flow in cleanrooms
Accessories
Connection technology
| Description | Article-Number |
|---|---|
| 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 |
|---|---|
| Mounting flange, steel, galvanic zinc-plated | 301 048 |
| Wall-mounting flange, stainless steel, PTFE-clamping ring | 520 181 |
| Compression fitting, stainless steel, G½, atmospheric pressure | 532 160 |
| Compression fitting, brass, G½, atmospheric pressure | 517 206 |
| Welded sleeve, steel, G½, according to EN 10241, 5 pieces | 524 916 |
| Welded sleeve, stainless steel 1.4571, G½, according to EN 10241, 2 pieces | 524 882 |
| Adapter M18 x 1, G½ | 545 090 |
| Assembly kit for pipe assembly suitable for MD 10.010/10.015, including pipe clamps and collar for adjustment for the pipe diameter | 531 394 |
Measured value display
| Description | Article-Number |
|---|---|
| SCHMIDT® LED display MD 10.010, in wall housing to show the volume flow velocity, 85 … 250 V AC and sensor power supply | 527 320 |
| SCHMIDT® LED display MD 10.010, similar to 527320 but with 24 V DC voltage supply | 528 240 |
| SCHMIDT® LED display MD 10.015, similar to 527320 but with additional sum function and second measuring input | 527 330 |
| SCHMIDT® LED display MD 10.015, similar to 527330 but with 24 V DC voltage supply | 528 250 |
Miscellaneous
| Description | Article-Number |
|---|---|
| Attachable protective clip for dumbbell head against mechanical influences, stainless steel | 531 026 |
| Attachable protective 2-wires-clip for protection against mechanical influences, stainless steel, H2O2-resistant |
559 124 |
| Technical data | |
|---|---|
| Measuring quantity | Standard flow velocity wN based on standard conditions 1) Temperature of medium TM |
| Measured medium | Air or nitrogen, other gases upon request |
| Measuring range wN | 0 … 1 / 10 / 20 m/s; Special measuring range inbetween 1 … 20 m/s (steps of 0.1 m/s) |
| Lower detection limit wN | 0.06 m/s |
| Measuring range TM | -20 … +70 °C |
| Measuring accuracy | |
| Standard wN | ±(5 % of measured value + [0.4 % of fmr; min 0.02 m/s]) 2) |
| High precision (optional) wN | ±(3 % of measured value + [0.4 % of fmr; min 0.02 m/s]) 2) |
| Response time (t90) wN | 3 s (jump from 0 to 5 m/s in air) |
| Temperature gradient wN | < 2 K/min (at wN = 5 m/s in air) |
| TM (for wN > 1 m/s) | ±1 K (10 … 30 °C); ±2 K (remaining measuring range) |
| Operating temperature | |
| Sensor / electronics | -20 … +70 °C |
| Storage temperature | -30 … +85 °C |
| General data | |
| Humidity | Measuring mode: Non-condensing (< 95 % RH) |
| Operating pressure | Atmospheric (700 … 1,300 hPa) |
| Display | Dual-LED: - Green: Status - Red (flashing): Sensor defective |
| Supply voltage | 24 V AC/DC ± 10 % |
| Current consumption | Typical < 60 mA, max. 100 mA |
| Analog outputs Type: Auto U / I) |
wN, TM 0 … 10 V / 4 … 20 mA (switching of signal characteristic depends on RL) -Voltage output (0 … 10 V): RL ≥ 550 Ω (short-circuit protected) - Current output (4 … 20 mA): RL ≤ 500 Ω - Change-over hysteresis: 50 Ω - CL ≤ 10 nF Voltage output: RL ≥ 500 Ω Current output: RL ≤ 500 Ω Hysteresis: 50 Ω |
| Electrical connection | Non-detachable cable, 5 x 0,25 mm2 Standard: Length 2 m or selectable (3 … 100 m; steps of 1 m), with ferrules Hygienic Design Option: 1.5 m, M12 plug (male, A-coded, 5 pole); Additional content of delivery: Cable 10 m, M12 bushing (female, A-coded, 5 pole) |
| Maximum cable length | Voltage interface / current interface: 100 m Voltage mode: Use AGND and RL ≥ 10 k (mass offset) |
| Mounting position | Arbitrary |
| Minimum immersion depth | 58 mm (< 58 mm upon request) |
| Protection type | IP65 |
| Protection class | III (SELV or PELV) |
| Probe length | 300/500 mm |
| Weight | 200 g max. |
| Material | |
| Sensor tube | Stainless steel 1.4571 |
| Sensor head | PBT (glass-fibre reinforced), stainless steel 1.4571 |
| Protective coating (optional) | Polyurethan / parylene (coating not available for Hygienic Design version) |
| Sensor cable | Standard: PUR, halogen-free Hygienic Design Option: PP-EPDM, halogen-free |
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