Flow Sensor SS 20.500
SCHMIDT® Flow Sensor SS 20.500 - Flow Sensors and Accessories
SCHMIDT® Flow Sensor SS 20.500 - Flow Sensors and Accessories. Measuring quantity Standard flow velocity wN based on standard conditions 1) | Temperature of medium T
Product Overview
The SCHMIDT® Flow Sensor SS 20.500 is part of the SCHMIDT Flow Sensors and Accessories line. The solution for flow measurement - especially for dusty air and gases. High precision and compact! ** NEW! We supply genuine, brand-new SCHMIDT Technology products with selection support, technical documentation and stable supply.
Specifications
| 测量量 / Measuring quantity | Standard flow velocity wN based on standard conditions 1) | Temperature of medium TM技术参数 |
|---|---|
| 被测介质 / Measured medium | Air or nitrogen, other gases on request技术参数 |
| 量程 / Measuring range wN | 0 ... 1 / 2.5 / 5 / 10 / 20 / 35 / 50 m/s技术参数 |
| 最低检出限 / Lower detection limit wN | 0.06 m/s技术参数 |
| 介质温度量程 / Measuring range TM | -40 ... +85 °C技术参数 |
| 测量精度（标准） / Standard wN | ±(3 % of measured value + [0.4 % of fmr; min. 0.02 m/s]) 2)测量精度 |
| 测量精度（高精度可选） / High precision (optional) wN | ±(1 % of measured value + [0.4 % of fmr; min. 0.02 m/s]) 2) (only for measuring range 0 ... 1 m/s)测量精度 |
| 响应时间 / Response time (t90) wN | 3 s (jump from 0 to 5 m/s in air)测量精度 |
| 温度梯度 / Temperature gradient wN | <= 2 K/min (at wN = 5 m/s in air)测量精度 |
| TM (wN > 1 m/s) | ±1 K (10 ... 30 °C); ±2 K (remaining measuring range)测量精度 |
| 传感器探头 / Sensor probe | -40 ... +85 °C工作温度 |
| Electronics | -20 ... +70 °C工作温度 |
| 存储温度 / Storage temperature | -40 ... +85 °C工作温度 |
| 外壳 / Enclosure | Aluminium, anodised材质 |
| 传感器管 / Sensor tube | Stainless steel 1.4404材质 |
| 传感器头部 / Sensor head | PBT (glass-fibre reinforced), stainless steel 1.4404材质 |
| 防护涂层 / Protective coating (optional) | Polyurethane derivate (black, sensor head only) / parylene (transparent, sensor head only or "fully coated")材质 |
| Protective sleeve (ATEX option) | Aluminium, anodised材质 |
| 传感器电缆 / Sensor cable (of remote sensor) | (TPE, halogenfree, black)材质 |
| 湿度 / Humidity | Measuring mode: Non-condensing (< 95 % RH)通用参数 |
| 工作压力 / Operating pressure (max.) | Compact version: 10 bar (overpressure) | Remote version: Atmospheric (700 hPa ... 1,300 hPa)通用参数 |
| 显示 / Display | 4 x Duo-LEDs (green/red/orange)通用参数 |
| 供电电压 / Supply voltage | 24 V AC/DC ± 20 %通用参数 |
| 电流消耗 / Current consumption | Typ. < 60 mA (max. 170 mA)通用参数 |
| 模拟输出 / 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 ohm (short-circuit protected) | - Current output (4 ... 20 mA): RL <= 500 ohm | - Change-over hysteresis: 50 ohm | - CL <= 10 nF通用参数 |
| 电气连接 / Electrical connection | Plug-in connector M12 (A-coded), male, 5-pin, screwed | ATEX approval only in combination with suitable cable!通用参数 |
| 最大电缆长度 / Maximum cable length | Voltage interface / current interface: 100 m | Voltage mode: Use AGND and RL >= 10 k (mass offset)通用参数 |
| 安装位置 / Mounting position | Arbitrary通用参数 |
| 最小插入深度 / Minimum immersion depth | 58.5 mm (< 58.5 mm on request)通用参数 |
| 防护等级 / Protection type | Sensor probe: IP67; enclosure: IP65; electrical connector: IP67 (with correctly attached cable)通用参数 |
| 防护等级 / Protection class | III (SELV or PELV)通用参数 |
| ATEX category | Gas (zone 2): II 3G Ex ec ic IIC T4 Gc | Dust (zone 22): II 3D Ex tc ic IIIC T135°C Dc通用参数 |
| 探头长度 / Probe length | Compact version: 100/150/350 mm; special length: >100 ... 1000 mm (step: 10 mm) | Remote version: 161 mm (probe); cable length: 3 m or special length 1 ... 30 m (step: 1 m)通用参数 |
| 重量 / Weight | 400 g max. (without connecting cable)通用参数 |
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