Ventilation Flow Sensor — SS 20.260
Спецификация SS 20.260
Available on request
Delivery across Russia
Order phone: +7(800)777-18-50
Description
The air flow sensor for ventilation SS 20.260 meets many requirements, such as a wide measurement range from near zero values to extremely large values. This sensor allows you to avoid cumbersome and error-prone additional measurements. Standard tasks solved by the SCHMIDT SS 20.260 sensor for ventilation systems and industrial processes include the following:
- Energy-efficient monitoring of ventilation system status
- Continuous filter condition monitoring
- Safe flow control in exhaust systems
- Control of air supply flow in industrial furnaces
- Flow measurement in drying processes
The reliable design of the sensor head protects sensitive elements from mechanical damage. Installation on pipelines with diameters from 25 mm to 1 m can be easily performed directly or using a flange or compression fitting. The sensor is placed in the center of the gas flow in a position that ensures the parallel flow passes through the sensor head. Thanks to the special design, the flow does not create interference, and the parallel passage of gas relative to the sensor head leads to self-cleaning of the sensitive elements. To protect against large dust particles, a protective structure is located on both sides of the sensitive elements. Direct contact between the sensitive elements and the medium ensures extremely fast detection of measured parameters. If necessary, the sensor can be easily cleaned by blowing through it or immersing it in water or an alcohol-containing liquid.
Upon customer request, the ventilation flow sensor can be supplied with an integrated temperature sensor, allowing temperature measurement of the medium in the range from -20 to +120 °C without additional installation. The linear output signal provides values in the range of 0…10 V for flow or 4…20 mA for flow and temperature.
- Specifications
- Overall Drawing
- Connection diagram
- Applications
| Technical Specifications SS 20.260 | |
| Unit of measurement | speed wN, normalized to standard conditions TN = 20 °C, pN = 101325 hPa |
| Measured media | air, nitrogen, other gases on request |
|
Speed measurement range |
0 ... 2.5 / 10 / 20 / 40 / 50 m/s |
| Min. measurable value | 0.2 m/s |
| Measurement temperature range TM (optional) |
-20 ... +120°C |
| Speed measurement error (basic version) | ±(5% of measured value + [0.4 % of measured range; min. 0.02 m/s]) |
| Speed measurement error (precision version) | ± (3% of measured value + [0.4 % of measured range; min. 0.02 m/s]) |
| Reproducibility wN | ± 1.5% of measured value |
| Response time t90 wN | 3s (step from 0 to 5 m/s) |
| Temperature gradient wN | < 8 K/min at 5 m/s |
| Temperature measurement accuracy (optional) | at wN > 2 m/s: ± 1 K (0 .. 40 °C) otherwise: ± 2 K |
| Probe operating temperature | -20 ... +120 °C |
| Electronic components operating temperature | 0 ... +70 °C |
| Storage temperature | -20 ... +85 °C |
| Sensitive element material | platinum element, glass passivation, PPO/PAA |
| Probe material | stainless steel 1.4571 |
| Housing material | PBT plastic, fiberglass reinforced |
| Connecting cable material | PVC |
| Operating humidity | up to 95 % relative humidity (without condensation) |
| Operating pressure | atmospheric (700 … 1300 hPa) |
| Indication | green LED: operating status red LED: measurement error |
| Power supply | 24 V DC ± 10 % |
| Current consumption | < 60 mA |
| Output signals (linear) temperature and flow | 0 ... 10 V (RL ≥ 10 kΩ) 4 ... 20 mA (RL ≤ 300 Ω) |
| Electrical connection | cable output, 4-wire, length 2 m, with stripped ends |
| Permissible cable length | max. 15 m (voltage output) max. 100 m (current output) |
| Orientation in space | any |
| Installation error | ± 3° to flow direction |
| Protection class | IP 65 / III |
| Probe length L | 50 / 100 / 200 / 350 / 500 mm |
| Weight | max. 200 g |
|
Cable Color |
Designation |
Function |
|
Brown (BR) |
Power |
Operating voltage: +UB |
|
White (WH) |
GND |
Operating voltage: Ground |
|
Yellow (YE) |
Analog wN |
Output signal: Flow rate |
|
Green (GR) |
Analog TM |
Output signal: Medium temperature |
Connection of sensor with current output:
Connection of sensor with voltage output:
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