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Flow sensors EX
Type Item no. ADG Euro / pc.

Flow sensor SF 321A 101596 01 431.60
ATEX-approval group II, category 2G,
housing made of V4A, connection to separate evaluation
electronics, equipment indicator II 2 G EEx ia IIC T4 Gb,
based on the calorimetric principle the flow sensor can be
used for monitoring liquid and gaseous media,
pressure-proof up to 30 bar.
Protection class: IP 67
Temperature class T4, 6 m junction cable TPE-S, 5 x 0.34 mm2 SENSORS
Media temperature: -20 °C – 70 °C
Measuring range: 3 – 300 cm / s, liquid medium,
200 – 2,000 cm / s gaseous medium,
thread G½ A
ATEX-certificate: DMT 03 ATEX E091
Data sheet no. 12101

Flow sensor SF 311A 101595 01 1,275.50
ATEX-approval group II, category 1 / 2G, zone 0 / zone 1,
housing made of V4A. Connection to separate evaluation
electronics, equipment indicator II 1 / 2 G EEx ia IIC T4 Ga / Gb4,
based on the calorimetric principle the flow sensor can be used for
monitoring liquid and gaseous media,
pressure-proof up to 300 bar.
Protection class: IP 67
Temperature class T4, 6 m junction cable TPE-S, 5 x 0.34 mm2
Media temperature: -20 °C – 60 °C,
Measuring range: 3 – 300 cm / s, liquid medium,
200 – 2,000 cm / s gaseous medium,
thread G½ A
ATEX-certificate: DMT 03 ATEX E090X
Data sheet no. 12101

Evaluation electronics 230 V AC SN 2301.1 101611 01 994.90
Evaluation electronics 24 V DC SR 2301.3 101622 01 1,411.40

Electronic evaluation VS2000 Exi and amplifier for
connecting flow sensors with relay output for airflow and line
monitoring with ATEX approval
Group II, Category (1) G, PTB 01 ATEX 2075.
The setting of the threshold value for gaseous and liquid media is
done by slide controls and potentiometers.
The current state is displayed by a 11-digit LED. The sensor
and power supply circuit are DC-isolated from each other.
The evaluation electronics and the connecting line are
monitored for wire break and short-circuit.
The accompanying monitoring relay drops out if either the value
falls below threshold or there is a wire break or short circuit.
Breaking capacity of the relay contacts:
4 A / 250 V AC
Frame with click-in base for installation on mounting rail
Permiss. amb. cond.: -20 – 60 °C, 0 – 95 % RH
(non-condensing)
Protection class: IP 40
Dimensions: 45 x 78 x 120 mm (L x W x D)
Data sheet no. 12150

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