Precise flow meter for low flow rates and aggressive media — SS 20.500
Спецификация SS 20.500
Available on request
Delivery across Russia
Order phone: +7(800)777-18-50
Description
The SCHMIDT® SS 20.500 flow meter offers the perfect solution for energy efficiency issues in various fields such as drying processes, exhaust systems, glove boxes, fume hoods, and many others. In addition to flow velocity, the sensor also measures operating temperature, and both parameters are displayed independently. This combined measurement reduces the number of required installation points, making installation simpler and, of course, reducing costs. Rotation angle values of 360° and tilt angle of 45° also simplify pipeline installation. The wide measurement range from 0.06 to 35 m/s and the possibility of high-precision calibration ensure measurement accuracy and reliability.
The patented sensor technology allows measurements in dusty environments. Sensor cleaning, if necessary, can be easily performed by the user. The streamlined shape of the sensor element enables accurate measurements even with imperfect flow characteristics. LED indication allows determining the flow level via four LED signals and checking the device’s functionality. The flow meter can output an analog signal both in 0...10V and 4...20 mA, automatically detecting the signal type based on the connection scheme. An optional ATEX version of the device is available, allowing use in hazardous environments and featuring a special coating that protects against aggressive media such as acetone, sulfuric and hydrochloric acids, and many others.
Upon customer request, high-precision sensor calibration confirmed by an ISO certificate can be performed. Calibration is carried out by SCHMIDT Technology on a special setup and can be repeated upon customer request.
- Specifications
- Overall Drawing
- Connection diagram
- Applications
| Technical Specifications | |
| Unit of measurement wN | Speed wN, normalized to standard conditions 20 °C and 1013.25 hPa |
| Measured media | Air or nitrogen; other gases on request |
| Measurement range wN | 0…1 / 2.5 / 5 / 10 / 20 / 35 m/s |
| Min. measurable value wN | 0.06 m/s |
| Medium temperature measurement range TM | Basic version: - 40 ... + 85 °C |
| Error wN (basic version) | ± 3 % of measured value + (0.4 % of measurement range; min. 0.02 m/s)* |
| Error wN (high-precision calibration) | ± 1 % of measured value + (0.4 % of measurement range; min. 0.08 m/s) * |
| Reproducibility wN | ± 1 % of measured value. |
| Response time t90 wN | 1 s (jump from 0 to 5 m/s) |
| Temperature gradient wN | < 2 K/min at wN = 5 m/s |
| Temperature measurement accuracy TM | ± 0.4 K (10 ... 30 °C); ± 1 K in the considered range at wN > 5 m/s |
| Operating temperature (probe) | Basic version: - 40 … + 85 °C |
| Operating temperature (electronic components) | - 20 … + 70 °C |
| Storage temperature | - 20 … + 85 °C |
| Material (sensor housing) | Anodized aluminum |
| Material (probe) | Stainless steel 1.4571 |
| Material (sensitive element) | Glass fiber reinforced PBT, stainless steel 1.4571 |
| Protective coating material (optional) | Polyurethane |
| Material (cable gland) | Anodized aluminum |
| Material (connecting cable in remote version) | PUR insulation, halogen-free, UL |
| Operating medium | gas without condensate (up to 95 % relative humidity) |
| Maximum pressure |
Basic version: 10 bar |
| Indication | 4 LED indicators (green/red/orange) |
| Power supply | 24 VDC/VAC ± 20 % |
| Current consumption | Standard 60 mA; max. 170 mA |
| Analog output for temperature and flow Auto detection U / I |
0 … 10 V / 4 … 20 mA (short circuit protection) Voltage output: > 500 Ohm Current output: < 500 Ohm Hysteresis: 50 Ohm |
| Electrical connection | M12 connector, 5-pin |
| Maximum cable length | Voltage output: 15 m, current output: 100 m |
| Orientation in space | arbitrary |
| Minimum immersion depth | 58 mm (<58 mm on request) |
| Degree of protection | IP 65 (housing), IP 67 (sensitive element) / III |
| ATEX category | II 3D Ex tc IIIC T125 ºC Dc IP64 II 3G Ex nA IIC T4 Gc |
| Probe length | 100 / 150 / 161.5 (remote version) / 350 / ≤ 1000 mm |
| Weight | max. 200 g (without connecting cable) |
*under standard conditions
Basic version:
Remote version:
Explosion-proof version:
Remote explosion-proof version:
|
Connector diagram |
Contact number |
Designation |
Function |
Cable color |
|
|
1 |
Power |
Operating voltage +UB in DC mode Operating voltage U~ in AC mode |
brown |
|
2 |
Analog TM |
Output signal: medium temperature |
white |
|
|
3 |
GND |
Operating voltage: ground in DC mode Operating voltage: U~ in AC mode |
blue |
|
|
4 |
Analog wN |
Output signal: flow rate normalized to standard conditions |
black |
|
|
5 |
AGND |
Analog output ground |
gray |
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