Dover OPW SiteSentinel iSite - Hydrocarbon Liquid Sensor with Water Indicator

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5.12 Hydrocarbon Liquid Sensor with Water
Indicator
Part Nos.: 6 feet: 30-0234-HW-06; 15 feet: 30-0234-HW-15;
20 feet: 30-0234-HW-20
The Hydrocarbon Liquid/Water Sensor (Figure 5-12), which is
available in lengths of 6 feet (1.8 m), 15 feet (4.6 m) and 20 feet (6.1
m), is used primarily for monitoring wet wells with fluctuating
groundwater tables. The sensor contains a carbon/polymer material
that changes its resistance when exposed to liquid hydrocarbons.
Additionally, a water sensor that relies on the conductivity of water to
detect its presence is utilized, providing the ability to discriminate
between hydrocarbon liquid and water. An alarm condition will result
from the absence of groundwater in a monitoring well. Detection of
fuel entering the containment area (indicating a leak) will also result in
an alarm condition, as will a break in the cable or sensor malfunction.
Figure 5-12 Hydrocarbon Liquid Sensor with
Water Indicator
Hydrocarbon Liquid/Water Sensor Specifications
Primary Use(s):
Monitoring wells
Detects:
Liquid hydrocarbons and water
Operating Temperature:
-40°F to 158°F (-40°C to +70°C)
Dimensions:
Length: 6’ (1.9 m), 15’ (4.6 m) or 20’ (6.1 m)
Diameter: 0.7” (1.8 cm)
Nominal Resistance:
Uncontaminated: 1,000 – 3,000 ohms/ft
Contaminated: 30,000 - 200,000 ohms/ft
Cable Requirements:
Belden #88760 or Alpha #55371
Maximum Wiring Length*:
1,000’ (305 m) field wiring
Multi-Drop Restriction:
16 per I.S. barrier channel (64 per barrier)
Connections:
Red = Power, Black = Signal, Shield =
Ground
*Maximum Wiring Length is the maximum length of cable to be used
to connect all sensors on an individual channel. This length includes
run of cable from VSmart to each sensor board in the string.