Flow Sensor SS 20.651
SCHMIDT® Flow Sensor SS 20.651 流量传感器
SCHMIDT® Flow Sensor SS 20.651 流量传感器，量程 0 ... 10 / 20 / 40 / 60 m/s；介质温度量程 0 ... +200/+350 °C；供电电压 24 V DC ± 20 %，原装全新正品
产品概述
SCHMIDT® Flow Sensor SS 20.651 属于 SCHMIDT 燃烧器与工业炉用流量传感器（Flow Sensors for Burners and Furnace Construction）产品线，量程 0 ... 10 / 20 / 40 / 60 m/s；介质温度量程 0 ... +200/+350 °C；供电电压 24 V DC ± 20 %；模拟输出 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。我司经销 SCHMIDT Technology 原装全新正品，可提供选型支持、技术资料与稳定供货。
技术参数
| 测量量 / Measuring quantity | Standard flow velocity wN based on standard conditions 1) | Medium temperature TM技术参数 |
|---|---|
| 被测介质 / Measured medium | Clean air or nitrogen, other gases upon request技术参数 |
| 量程 / Measuring range wN | 0 ... 10 / 20 / 40 / 60 m/s技术参数 |
| 最低检出限 / Lower detection limit wN | 0.2 m/s (at TM = 20 °C)技术参数 |
| 介质温度量程 / Measuring range TM | 0 ... +200/+350 °C技术参数 |
| 传感器头部 / Sensor head | 0 ... +200/+350 °C工作温度 |
| Electronics | -20 ... +70 °C工作温度 |
| 存储温度 / Storage temperature | -20 ... +85 °C工作温度 |
| 外壳 / Housing | Aluminium, anodised材质 |
| 传感器管 / Sensor tube | Stainless steel 1.4571材质 |
| 传感器头部 / Sensor head | Platinum element (glass-passivated), ceramics材质 |
| 卡套接头 / Compression fitting | Stainless steel 1.4571 or brass (depending on sensor option)材质 |
| 测量精度（标准） / Standard wN | ±(3 % of measured value + [0.4 % of fmr; min. 0.08 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. 0.08 m/s]) 2)测量精度 |
| 响应时间 / Response time (t90) wN | 3 s (jump of wN from 0 to 5 m/s in air)测量精度 |
| 温度梯度 / Temperature gradient wN | < 8 K/min (at wN = 5 m/s in air)测量精度 |
| Temperature TM (wN > 2 m/s) | ±2 K (TM = 10 ... 30 °C); ±4 K (remaining measuring range)测量精度 |
| Recovery time wN | < 10 s (after temperature change of ∆ϑ = 40 K and at wN = 5 m/s in air)测量精度 |
| 湿度 / Humidity | Measuring mode: Non-condensing (< 95 % RH); high relative air humidity in combination with high temperature can cause measurement deviations通用参数 |
| 工作压力 / Operating pressure (max.) | Atmospheric (700 ... 1,300 hPa) / 16 bar (optional; over pressure)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 DC ± 20 %通用参数 |
| 电流消耗 / Current consumption | Typ. 50 mA (without pulse outputs); max. 250 mA (including signal currents of all outputs)通用参数 |
| Start up time | Approx. 10 s after switch-on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 |
| 脉冲输出：信号形式 / Pulse outputs: Signalization | Standard: Frequency f ~ wN | f = 0 ... fmax | fmax = 100 Hz (option: fmax = 10 ... 99 Hz) | Optional: Pulse quantity: | 1 pulse/1 m3; 1 pulse/0.1 m3; 1 pulse/0.01 m3 (max. 100 pulses/s)通用参数 |
| 脉冲输出：技术 / Pulse outputs: Technology | 1. Highside-driver (PNP, open collector) at protected supply voltage; not galvanically isolated) | Short-circuit protected (analog): 100 mA | High level: > supply voltage - 3 V | Leckage current: IOFF < 10 µA | 2. Semiconductor relay; output galvanically isolated | Output voltage/current: Max. 30 V / 50 mA通用参数 |
| Fieldbus (optional) | Profibus DP / DeviceNet通用参数 |
| 电气连接 / Electrical connection | Plug-in connector M12 (A-coded), male, 8-pole (shielded), screwed通用参数 |
| 最大电缆长度 / Maximum cable length | Voltage interface / current interface / pulse outputs: 100 m | Voltage mode: Use AGND and RL >= 10 k (mass offset)通用参数 |
| 安装位置 / Mounting position | Arbitrary (atmospheric; under higher pressure preferred horizontally)通用参数 |
| 安装公差 / Mounting tolerance | ±3° relative to flow direction (unidirectional)通用参数 |
| 最小插入深度 / Minimum immersion depth | DN25 ( also more, depending on the temperature of medium)通用参数 |
| Power-up time | 10 s (after switching-on)通用参数 |
| 防护等级 / Protection type | Sensor probe: IP54; 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 |
| 探头长度 / Probe length | 250/400/600/1,000 mm (for both versions: compact and remote probe)通用参数 |
| Cable length (remote version) | Selectable: 1 ... 10 m (step: 1 m)通用参数 |
| 重量 / Weight | 550 g max. (400 mm probe length) / 750 g (field bus version)通用参数 |
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