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Interstitial Level Sensors
Part #30-3221-1A, 30-3221-1B
The Interstitial Level Sensors are used primarily in the interstitial area
of a double-walled tank. The sensor contains a float switch that
activates in the presence of a liquid. The Interstitial Level Sensor is
available in two configurations.
The 30-3221-1A is constructed from chemical-resistant non-metallic
material.
The 30-3221-1B is constructed from brass.
It can also be used in sumps, dispenser pans and other locations
where the presence of a liquid could indicate that a leak has occurred.
In combination with a vapor sensor, this sensor can be used to
monitor wet wells to ensure that a liquid is normally present. In the
event of a break in the cable, the system will activate the alarm.
Interstitial Level Sensor
Interstitial Level Sensor
Substance Detected:
Liquid
Operating Temperature:
-4°F to 122°F (-20°C to +50°C)
Dimensions:
30-3221-1A
1.3” x 3.9” (3.4 cm x 10 cm)
30-3219-1B
1.4” x 3.5” (3.5 cm x 9 cm)
Required Cable:
15’ (4.6 m) gas-and-oil resistant cable
Maximum Wiring Length*:
1,000’ (305 m)
Multi-Drop Restriction:
1 per channel
Connections:
Red = Power, Black = Signal
*Maximum Wiring Length is the maximum length of cable to be used
to connect all sensors on an individual channel. The length includes
run of cable from VSmart to each sensor board in the string.