Compact and versatile OEM flow velocity sensor — SS 20.250
Спецификация SS 20.250
Available on request
Delivery across Russia
Order phone: +7(800)777-18-50
Description
Speed sensor SS 20.250 – the most compact device for universal use, featuring excellent performance characteristics.
Thanks to its compact design, the SS 20.250 can be easily installed using a mounting flange or compression fitting. All electronic components of the device are housed in a durable metal probe body with a diameter of only 9 mm. Due to the special design of the sensitive element and the wide immersion angle (radial: 360°, axial: ± 45°), the sensor can be quickly and safely installed. In addition to measuring flow velocity in the range from 0.06 to 20 m/s, the device also measures the medium temperature. Two types of output signals are available: from 4 to 20 mA, or from 0 to 10 V. The sensor automatically determines the type of output signal based on the values of the connected resistance.
Thanks to the design of the sensitive element, the sensor can be used in dusty gas environments. If dirt gets on the sensitive element, the user can easily clean it. On request, a version of the sensor with a protective coating is also available, making the device resistant to aggressive environments such as acetone, sulfuric and hydrochloric acids, as well as many others.
Applications
- Monitoring the energy efficiency of fans
- Continuous monitoring of filtering units
- Safety control by measuring flow in exhaust shafts
- Monitoring laminar flows in clean rooms
- Specifications
- Overall Drawing
- Connection diagram
- Applications
| Technical Specifications SS 20.250 | |
| Unit of measurement | speed (wN), normalized to standard conditions TN = 20 °C, pN = 101325 hPa ambient temperature (TM) |
| Measured media | air, nitrogen, other gases on request |
|
Speed measurement range |
0 ... 1 / 10 / 20 m/s |
| Min. measurable value | 0.06 m/s |
| Measurement range temperature TM |
-20 ... +70 °C |
| Speed measurement accuracy (standard version) | ± (5 % of measured value + [0.4 % of measurement range; min. 0.02 m/s])1 |
| Speed measurement accuracy (precision version) | ± (3 % of measured value + [0.4 % of measurement range; min. 0.02 m/s])1 |
| Reproducibility wN | ± 1.5% of measured value |
| Response time t90 wN | 3s (step from 0 to 5 m/s) |
| Temperature gradient wN | < 2 K/min at 5 m/s |
| Temperature measurement accuracy (optional) | at wN > 2 m/s: ± 0.4 K (0 .. 30 °C) in other ranges: ± 1 K |
| Operating temperature | -20 ... +70 °C |
| Storage temperature | -30 ... +85 °C |
| Sensitive element material | PBT, glass fiber reinforced, galvanized aluminum |
| Probe material | stainless steel 1.4571 |
| Housing material | PBT plastic, glass fiber reinforced |
| Connection cable material | PVC, halogen-free |
| Operating humidity | up to 95 % relative humidity (without condensation) |
| Operating pressure | atmospheric (700 … 1300 hPa) |
| Indication | dual LED signal (green / red) |
| Power supply | 24 V AC/DC ± 10 %, max. 100 mA |
| Current consumption | < 60 mA (typical) |
| Output signals (linear) temperature and flow | 0 ... 10 V / 4 ... 20 mA (short circuit protection): voltage output: R L > 500 Ω current output: R L < 500 Ω hysteresis: 50 Ω |
| Electrical connection | cable outlet, 4-pin, length 2 m |
| Permissible cable length | max. 100 m |
| Orientation in space | any |
| Min. immersion depth | 58 mm (< 58 mm on request) |
| Protection class | IP 65 / III (PELV) |
| Probe length L | 300 / 500 mm |
| Weight | max. 200 g |
1) under standard conditions
| Designation | Function | Cable color |
| Power |
Operating voltage: ±UB in DC mode |
Brown |
| Analog wN | Flow rate output data | Yellow |
| Analog TM | Temperature output data | Green |
| GND | Operating voltage: ±UB in DC mode Operating voltage: U~ in AC mode |
White |
| AGND | Analog output reference ground | Gray |
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