Flow Sensor SS 20.250
SCHMIDT® Flow Sensor SS 20.250 - Flow Sensors for Laboratory, Pharmaceutical and Clean Room Technology
SCHMIDT® Flow Sensor SS 20.250 - Flow Sensors for Laboratory, Pharmaceutical and Clean Room Technology. Measuring quantity Standard flow velocity wN based on standar
Product Overview
The SCHMIDT® Flow Sensor SS 20.250 is part of the SCHMIDT Flow Sensors for Laboratory, Pharmaceutical and Clean Room Technology line. The smallest all-rounder - universal and powerful Patented sensor head (dumb-bell head): - Largely independent from flow direction - Easy to clean (free of undercuts) - Dirt-resistantFlow and medium temperature signalProbe length 300 ... 500 mmMeasuring ranges 0 ... 1 m/s to 0 ... 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 upon request技术参数 |
| 量程 / Measuring range wN | 0 ... 1 / 10 / 20 m/s; | Special measuring range inbetween 1 ... 20 m/s (steps of 0.1 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 | -20 ... +70 °C技术参数 |
| 测量精度（标准） / Standard wN | ±(5 % 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 | ±(3 % of measured value + [0.4 % of fmr; min 0.02 m/s]) 2)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 (for wN > 1 m/s) | ±1 K (10 ... 30 °C); ±2 K (remaining measuring range)测量精度 |
| Sensor / electronics | -20 ... +70 °C工作温度 |
| 存储温度 / Storage temperature | -30 ... +85 °C工作温度 |
| 湿度 / Humidity | Measuring mode: Non-condensing (< 95 % RH)通用参数 |
| 工作压力 / Operating pressure | Atmospheric (700 ... 1,300 hPa)通用参数 |
| 显示 / Display | Dual-LED: | - Green: Status | - Red (flashing): Sensor defective通用参数 |
| 供电电压 / Supply voltage | 24 V AC/DC ± 10 %通用参数 |
| 电流消耗 / Current consumption | Typical < 60 mA, max. 100 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 | Voltage output: RL >= 500 ohmCurrent output: RL <= 500 ohmHysteresis: 50 ohm通用参数 |
| 电气连接 / Electrical connection | Non-detachable cable, 5 x 0,25 mm2 | Standard: Length 2 m or selectable (3 ... 100 m; steps of 1 m), with ferrules | Hygienic Design Option: 1.5 m, M12 plug (male, A-coded, 5 pole); | Additional content of delivery: Cable 10 m, M12 bushing (female, A-coded, 5 pole)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 mm (< 58 mm upon request)通用参数 |
| 防护等级 / Protection type | IP65通用参数 |
| 防护等级 / Protection class | III (SELV or PELV)通用参数 |
| 探头长度 / Probe length | 300/500 mm通用参数 |
| 重量 / Weight | 200 g max.通用参数 |
| 传感器管 / Sensor tube | Stainless steel 1.4571材质 |
| 传感器头部 / Sensor head | PBT (glass-fibre reinforced), stainless steel 1.4571材质 |
| 防护涂层 / Protective coating (optional) | Polyurethan / parylene (coating not available for Hygienic Design version)材质 |
| 传感器电缆 / Sensor cable | Standard: PUR, halogen-free | Hygienic Design Option: PP-EPDM, halogen-free材质 |
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