schmidt flow sensors

For supervision and control in industrial processes the thermic SCHMIDT® Flow Sensors provide many benefits:

• Direct detection of norm flow velocity independent of pressure and temperature
• Highly accurate and reproducible – documented by ISO – calibration certificates
• Available in ATEX-version for use in explosion-protected environments
• Sensors with dumb-bell head and special coating are suitable for dusty and / or aggressive gases
• Applicable up to +350 °C medium temperature
• Suitable in different gases and gas mixtures – up to 16 bar overpressure

Product Code	SS 20.200/201	SS 20.260	SS 20.500	SS 20.650	SS 20.60 / SS 25.60	SS 23.400
sensor head	dumb-bell head	chamber head	dumb-bell head	chamber head	chamber head	thermopile head
Measuring range	0.06 … 20 m/s	0.2 … 50 m/s	0.06 … 35 m/s	0.2 … 60 m/s	0.2 … 200 m/s	0.05 … 20 m/s
Medium temperature	-20 … +85 °C	-40 … +85 / 120 °C	-40 … 85°C	0 … +200/350°C	0 … +85/120°C	0 … 60 °C
Temperature measurement	–	yes (optional)	yes	yes	–	–
Medium	clean or dusty gases gase	relatively clean gases (not aggressive)	clean or dusty gases gase	relatively clean gases (not aggressive)	relatively clean gases (not aggressive) SS 25.60: pure oxygen	clean gases (not aggressive)
Aggressive Media	SS 20.201 coated	no	yes, optional coating	no	no	no
ATEX	no	no	Option (cat. 3, zone 2)	no	no	yes (cat. 3, zone 2)
Max. pressure	10 bar	atmosph.	10 bar	16 bar (optional)	16 bar	atmosph.
Output signals	switching output (flow monitor, galvanic separated)	0 ... 10 V or 0/4 ... 20 mA	Auto-U/I (automatic switch V↔ I)	0 ... 10 V or 4 ... 20 mA, Impulse	0 ... 10 V or 4 ... 20 mA, Impulse Fieldbus (optional)	0 ... 10 V or 4 ... 20 mA, 2 x switching output (OC)
Supply voltage	24 V DC ± 20 %	24 V DC ± 20 %	24 V AC/DC ± 20 %	24 V DC ± 20 %	24 V DC ± 20 %	7.5/12 ... 26.4 V DC