SCHMIDT Technology - Products - SCHMIDT® Flow Sensors for Cleanroom


Product code	SS 20.250	SS 20.515 / 516	SS 20.400 / SS 23.400	SS 20.415	SS 20.500
Application	Filter monitoring, supply and exhaust control	Filter monitoring, Room monitoring	Flow direction (turbulence degree)	Flow direction (turbulence degree)	Filter monitoring, Room monitoring if corrosive medias are present
Sensor head	Dumb-bell head	Dumb-bell head	Thermopile head	Thermopile head	Dumb-bell head
Measuring range	0,06 … 20 m/s	0,06 … 10 m/s	0,05 … 20 m/s	0,05 … 20 m/s	0,06 … 35 m/s
Medium temperature	-20 ... +70 °C	0 ... +60 °C	0 … +60 °C	0 … +60 °C	-20 … +85 °C
Moistness area	0 ... 95 % rF	0 ... 95 % rF	0 ... 95 % rF	0 ... 95 % rF	0 ... 95 % rF
Specials	SS 20.515 for disinfection with H₂O₂ (VHP)	SS 20.515 for disinfection with H₂O₂ (VHP) SS 20.516 for disinfection with alcohol (with coating)	Bi-directional flow sensor Switching outputs Measurement of turbulence degree Self monitoring function Detection of contamination ATEX version for Ex-secured areas	Disinfection with H₂O₂ and alcohols Bi-directional flow sensor Switching outputs Measurement of turbulence degree Self monitoring function Detection of contamination	Disinfection with H₂O₂ and alcohols Protection against corrosion e.g.: - hydrochloric acid - caustic soda - acetone High precision adjustment
Mounting	Mounting lengths from 300 / 500 mm available	Screwed bush M25 (stainless steel) Quick mounting system - Counternut - Screw adapter - Shank nut - Flange bushing	Easy one-hole-mounting	Screwed bush M25 (stainless steel) Quick mounting system - Counternut - Screw adapter - Shank nut - Flange bushing	Mounting lengths from 100 to 1.000 mm available
Output signals	Auto UI 4 … 20 mA ↔ 0 … 10 V	0 ... 10 V 4 ... 20 mA	0 ... 2 V 0 ... 5 V 0 ... 10 V 0 ... 20 mA 4 ... 20 mA	0 ... 10 V 4 ... 20 mA	Auto UI 4 … 20 mA ↔ 0 … 10 V

SCHMIDT® Flow Sensors for Cleanroom

For measurements in cleanrooms the thermic SCHMIDT® Flow Sensors provide many benefits:

Direct detection of flow velocity from 0.05 m/s

Cleanroom suitable – no moving parts, no grit (IP65 – IP67 degree of protection)

„Hygienic Design“ – easy cleanable dumb-bell head, disinfectable, hydrogen-peroxide resistant, suitable for VHP (Vaporized Hydrogen Peroxide) -method

In compliance with requirements of ISO 14644 regarding measuring range

„Bi-directional sensor“ enables the identification of over flow direction even during decrease of pressure

ISO-calibration protocol available – enables requirements of pharmaceutical industry

Easy to integrate in monitoring systems through variable data interfaces

Corrosion protection, resistant against aggressive process media (acid, brine, solvent)

Which sensor is suitable for which application?
There are special SCHMIDT® Flow Sensors for use in cleanroom and hygienic environments available:

Application examples:

Cleanroom supervision – monitoring

Detection of flow velocity, supervision of filter leakage, control of flow velocity

Detection of turbulence degree for estimation of laminarity of cleanroom flow

Supervision of flow direction (in case of decrease of pressure or reduction of flow velocity beyond production times

Energy saving and efficiency through

Higher measurement accuracy for efficient reduction of the flow velocity beyond production times (higher accuracy compared to stationed pressure measurement)

Plant monitoring

Supervision of plant integrated filter units

Control of exhaustion processes with corrosive media

Determination of turbulence degrees within one plant

Pharmaceutical Industry

Integration in cleanroom-monitoring (Annex1 GMP-guidelines)

Charge release in case of decrease of pressure through documentation of flow direction

Semi-conductor Industry

Flow monitoring if corrosive process media is present

Filter monitoring in clean machines