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SIKA > 流量和液位測量

Calorimetric flow monitors / Separate design with separate switching transducer

型號：Type VEG

No movable parts in the flow
setpoint at extremely low flow possible
high compressive strength
applicable with different nominal diameters

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產品特點產品規格

The calorimetric SIKA flow monitors of the VE series are used for monitoring volumetric flows. Typical applications are:

dry-run protection for pumps
monitoring of lubrication circuits
cooling and heating circuits
leakage monitoring

The flow monitor is easily screwed directly into the process line by means of a connection thread. As the measuring probe is available in two different lengths, a wide range of pipelines with various nominal diameters and wall thicknesses is covered.

In the compact version VES, the flow sensor and the associated evaluation electronics form one unit. In this way, the flow can be monitored directly at the measuring point.

The calorimetric flow monitor works according to the principle of temperature difference detection. There are two temperature sensors inside the cylindrical measuring probe. They have optimal heat-conducting contact with the medium and at the same time a good thermal insulation to each other. One sensor is heated with constant power, the other is not heated and thus assumes the medium temperature. When the medium is stationary, there will be a constant temperature difference between the two sensors.

The heated sensor is cooled by the flowing medium. The changed temperature difference between the two sensors depends on the flow velocity and is therefore a parameter for monitoring the preselected minimum flow. This signal is fed by a comparator controlling a transistor output signal.

The output signal is set to the desired flow limit value using a potentiometer. If this value is undercut, the transistor output signal is activated. A 6-digit LED chain indicates the proximity to the set alarm point.

Your advantages
Series	VE
	No moving parts in the flow Switching point possible with extremely low flow rate High compressive strength Suitable for use in different nominal sizes

Technical data
Type	VES (compact version)
Length of measuring probe →VES08 →VES09 →VES12 →VES13	31 mm 48 mm 100 mm 170 mm
Thread length →VES08 →VES09 →VES12 →VES13	15 mm 29 mm 20 mm 20 mm
Temperature gradient	4 °C/s
Detection range →Water →Oil	1...150 cm/s 3...300 cm/s
Stand-by time	Approx. 2...15 s
Response time →VES08 / VES09 →VES12 / VES13	Approx. 1...13 s Approx. 5...20 s
Max. pressure rating	200 bar
Medium temperature	-20...85 °C
Ambient temperature	-20...60 °C
Process connection	G½ male
Electrical connection	4-pin-plug connector M12 x 1
Degree of protection EN 60529	IP67
Switching transducer	Integrated

Technical data
Type	VES (compact version)
Display	LEDs: 1 red = alarm, 2 yellow = switching point, 3 - 6 green = flow
Power supply	24 VDC (±10 %)
Current consumption	70 mA
Output signal Max. output current	PNP, open collector 400 mA (25 °C)

Technical data
Type	VEG (separate version)
Length of measuring probe →VEG08 →VEG09	31 mm 48 mm
Thread length →VEG08 →VEG09	15 mm 35 mm
Temperature gradient	4 °C/s
Stand-by time	Approx. 2...15 s
Response time	Approx. 1...13 s
Max. pressure rating	200 bar
Medium temperature	-20...85 °C
Ambient temperature	-20...60 °C
Process connection	G½ male
Electrical connection	4-pin-plug connector M12 x 1
Schutzart EN 60529	IP67
Switching transducer	Separate
Display	LEDs: 1 red = alarm, 2 yellow = switching point, 3 - 6 green = flow
Power supply	24 VDC (±20 %) (standard)	230 VAC (+10 % / -20 %) (on request)
Current consumption	80 mA	35 mA
Output signal Max. switching voltage Max. output current Max. switching capacity	Relay, closing contact 230 VAC/250 VDC; 1 A 125 VA / 60 W	Relay, change over contact 230 VAC/60 VDC; 4 A 1000 VA / 60 W

代理品牌

Calorimetric flow monitors / Separate design with separate switching transducer

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