Gas flow meter for high-temperature environments — SS 20.650
Спецификация SS 20.650
Available on request
Delivery across Russia
Order phone: +7(800)777-18-50
Description
Measurement of flow velocity and/or flow rate at high temperatures up to +350° is extremely important in many areas of production. The requirements for a stationary sensor are very high. Key parameters when choosing a device may include: mechanical strength, accurate and stable measurement, ease of installation, a wide range of measurable values, and the ability to measure temperature. The SS 20.650 flow sensor meets all these requirements. Measuring gas flow at high temperatures can be relevant in the following industrial sectors:
Combustion control in industrial furnaces
Innovative ceramic products are increasingly used in the medical, automotive, and environmental industries. These products have diverse requirements, and one of the conditions for their fulfillment is the proper execution of firing processes. The SCHMIDT® SS 20.650 sensor is specially designed to measure combustion air at temperatures up to +350°. Direct flow measurement without additional sensors
ensures stoichiometric accuracy during combustion.
Drying process monitoring
In coating technologies, drying processes play an important role in improving product quality and avoiding defects. The SS 20.650 flow meter allows control of the drying process by regulating air flow. Simultaneous temperature measurement also plays an important role. Another advantage of these sensors is the lack of maintenance requirements, which can be important since the devices are often installed in areas with difficult access.
Air compressor control
In the operation of modern compressors, situations may arise where the temperature can rise up to +200°. At the same time, the sensor must operate in a high-pressure environment, with pressure values reaching up to 16 bar. Thanks to the wide measurement range of the SS 20.650 flow meter (from 0.2 to 60 m/s), you can monitor compressor energy consumption and detect leaks. Additionally, the measurement accuracy allows you to correctly calculate the amount of compressed air.
Advantages
- Direct measurement of velocity, normalized to standard conditions at temperatures up to +350 °C;
- Contains no moving parts and requires no regular maintenance;
- Dynamic range value up to 1:300;
- Built-in temperature sensor;
- High-precision calibration certified by ISO (optional);
- Analog and digital outputs;
- Connection to industrial network (optional);
- Easy-to-clean SS;
- Durable and compact housing;
- Two-color LED indication;
- Optional immersion length up to 1,000 mm;
- Economical basic version with temperature range up to +200 °C.
- Specifications
- Overall Drawing
- Connection diagram
- Applications
| Technical Specifications SS 20.650 | |
| Unit of measurement | speed wN, normalized to standard conditions, TN = 20 °C and pN = 1,013.25 hPa |
| Measured medium | air, nitrogen, other gases on request |
| Measuring range wN |
0 ... 10 / 20 / 40 / 60 m/s (40 / 60 m/s for Tmax version +200 °C) |
| Min. measured value | 0.2 m/s |
| Accuracy (standard version) | ±(3% of measured value + 0.4 % of measuring range)1 |
| Accuracy (precision version) | ±(1% of measured value + 0.4 % of measuring range)1 |
| Reproducibility wN | ±0.5% of measured value |
| Response time t90 | 3 s (step from 0 to 5 m/s) |
| Temperature gradient | 8 K/min at wN = 5 m/s |
| Pressure dependence | independent of medium pressure |
| Measuring temperature range | 0 … +200 °C / +350 °C |
| Temperature measurement accuracy | ±1 % of measuring range (min. 1 K) |
| Sensor operating temperature | 0 … +200 °C / +350 °C |
| Operating temperature of electronic components | -20 ... +70 °C |
| Operating pressure | standard version: 700 ... 1300 hPa high-temp version for high pressures: 0-16 bar |
| Power supply UB | 24 VDC ±20 % |
| Current consumption | approx. 100 mA at wN = 20 m/s and TM = 350°C |
| Switching current | 140 mA max. for 5 s |
| Stabilization time | approx. 10 s after power on |
| Electrical connection | M12 plug, 8-pin |
| Permissible cable length | Voltage output: 15 m Current output: 100 m Digital output: 100 m |
| Analog outputs | Type selected when ordering 1 for flow and 1 for temperature Voltage: 0...10 V (RL ≥ 10 kΩ) Current: 4...20 mA (RL ≤ 400 Ω) |
| Digital output wN | pulse output upper limit: ≥ UB -1.5 V lower limit: ≤ ≤ 0.7 V load current: ≤ 400 mA |
| Frequency at digital output |
0 ... 10 / 16 / 20 / 40 / 100 Hz (selected when ordering) |
| Min. pulse length | 1 / (2 x fmax) |
| Housing material | aluminum AlMgSiPb, anodized |
| Probe material | stainless steel X6 CrNiMoTi 1.4571 |
| Measuring chamber material | ceramic |
| Sensing element material | platinum, glass-passivated |
| Process connection | brass compression fitting, thread G1/2 x 12 |
| Orientation | ±3° relative to flow direction |
| Mounting position | any2 |
| Probe length (L) | 400/600/1000 mm; custom length on request |
| Weight | max. 550 g (with 400 mm probe length) 800 g (version with industrial network connection) |
| Housing protection class | IP 65 |
| Sensing element protection class | IP 67 (high-temperature version for high pressures) |
1) Under standard conditions
2) Except for downward flow at < 2 m/s and under pressure
Dimensions of the standard version:
Dimensions of the version with PROFIBUS connection:
Installation dimensions:
| Connector Diagram | Pin | Designation | Function | Cable Color |
 |
1 | Digital wN | Output flow signal (digital: pulse) | White |
| 2 | Power | Operating voltage +UB | Brown | |
| 3 | Analog TM | Output medium temperature signal (analog: U / I) |
Green | |
| 4 | Analog wN | Output flow signal (analog: U / I) |
Yellow | |
| 5 | - | Not connected | Gray | |
| 6 | - | Not connected | Pink | |
| 7 | GND | Operating voltage: Ground | Blue | |
| 8 | - | Not connected | Red |
Current output:
Voltage output:
Pulse output:
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