Dover OPW SiteSentinel iTouch M1500 - 30-3221-1 A, -1 B Interstitial Level Sensors

Doc. No.: M1500, Rev. 6
Page 58 of 127
• 67733 Gross Point Road 900 Santa Fe Dr.
1.25 30-3221-1A, -1B Interstitial Level Sensors
These two types of interstitial level sensors are used primarily in the interstitial area of a double walled tank.
The sensors have a float switch that activates in the presence of a liquid. The 30-3221-1A is constructed from
chemical resistant, non-metallic material and the 30-3221-1B is constructed from brass.
These sensors can also be used in sumps, dispenser pans and other locations where the presence of a liquid
could indicate that a leak has occurred. Combined with a vapor sensor, this interstitial 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 an alarm.
30-3221-1A, -1B Specifications
Operating Temperature
–20 C to +50 C (–4 F to +122 F)
Dimensions - 30-3221-1A
3.4 cm (1.3 in) dia. x 10 cm (3.9 in) long
Dimensions - 30-3221-1B
3.5 cm (1.4 in) dia. x 9.0 cm (3.5 in) long
Cable
4.5 m (15 ft) gas & oil resistant
NOTE: To ensure safe operating conditions the sensor has been designed to connect to OPW Fuel
Management Systems’ controller only.