自1945年以来，在超过55年的时间里，WTW在优质水测试仪器的设计和生产方面一直发挥着重要作用。WTW自豪地提供范围较广，较受认可的产品线，并在全球范围内进行分销。
WTW产品有：紫外/可见分光光度计，光度计，浊度，溶解氧传感器。
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Model
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VisoTurb® 700 IQ
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Measuring method
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Nephelometric principle in compliance with EN ISO 7027
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Measuring range
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FNU; NTU; TEF 0 ... 4000 FNU
mg/l SiO2; ppm SiO2 0.1 ... 4000 mg/l SiO2
g/l TS 0.0001 ... 400 g/l TS
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Resolution
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FNU; NTU; TEF Automatic according to measuring range 0.001 ... 1 FNU
mg/l SiO2; ppm SiO2 0.001 mg/l ... 0.01 g/l
g/l TS 0.001 mg/l … 1 g/l
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Accuracy
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Depends on application
Process variation coefficient according to DIN 38402 part 51 <1 % (in the range up to 2000 FNU)
Repeatability according to DIN ISO 5725 or DIN 1319 < 0.015 % or ≥ 0.006 FNU
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Calibration
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FNU; NTU; TEF Factory calibration with formazine
mg/l SiO2; ppm SiO2 Factory calibration with SiO2
g/l TS Calibration by user, (TSS regulations in compliance with DIN 38414)
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Cleaning System
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Ultrasound cleaning system
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SensCheck
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Contamination detection of optical window; failure of cleaning system
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Pressure Resistance
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10 bar (incl. sensor connection cable)
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Ambient Conditions
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Operating temperature: 32 ... 140 °F (0 ... 60 °C);
ultrasonic cleaning system: 32 ... 104 °F (0 ... 40 °C) (overheating protection);
Storage temperature: 23 ... 149 °F (-5 ... +65 °C)
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Electrical connections
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2-wire shield cable with quick fastener to sensor
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Electromagnetic Compatibility
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EN 61326, Class B, FCC Class A; Intended for indispensable operation
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Certifications
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CE
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Mechanical
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Measuring window: Sapphire;
Sensor body: V4A stainless steel 1.4571;
Protection rating: IP 68
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Weight (without cable)
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Approx. 2.18 lb (900 g)
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WTW浊度传感器VisoTurb系列介绍
VisoTurb®：符合 EN ISO 7027 的浊度原理的光学浊度传感器，用于带有超声波清洗系统的水/废水中的原位使用：
• 无需机械师的超声波清洗
• 极低维护
• 高精度工厂校准
• 操作安全性高（传感器检查功能）
超声波清洗系统确保传感器的低维护和持续可靠的测量操作，因此非常适合极端应用，例如废水处理厂。
借助 VisoTurb® 的浊度测量原理，杂散光以 90° 角进行测量。该测量装置适用于高达 4000 FNU 的中低浊度值。根据 EN ISO 7027，红外光用于 860 nm 波长范围内。该波长在可见范围之外，因此可能的样品着色通常不会造成任何干扰。
海水模型包括用于特殊介质的传感器：所有接液部件均由钛和塑料制成，因此具有极强的耐腐蚀性。
VisoTurb®: Optical turbidity sensors according to nephelometric principle according to EN ISO 7027 for the in-situ use in water/wastewater with ultrasonic cleaning system:
• Ultrasonic cleaning without mechanics
• Extremely low-maintenance
• Highly accurate factory calibration
• High operational safety (sensor check function)
The ultrasonic cleaning system ensures the low-maintenance and continuously reliable measuring operation of the sensors, which are therefore very suited for extreme applications, such as wastewater treatment plants.
With the nephelometric measuring principle of the VisoTurb®, the stray light is measured at a 90° angle. The measuring setup is suitable for low and medium turbidity values up to 4000 FNU. According to EN ISO 7027, infrared light is used in the wavelength range of 860 nm. This wave length is outside the visible range, so that possible sample colorings generally do not cause any interference.
The sea water model includes the sensor for use in special media: All wetted parts are made of titanium and plastic and are therefore extremely resistant to corrosion.
WTW浊度传感器VisoTurb 700 IQ/系列其他常用型号：
WTW VisoTurb 700 IQ
WTW VisoTurb 700 IQ SW