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Environmental sensors
4.1.1
VISY-Stick Interstitial
The sensor VISY-Stick Interstitial is designed for monitoring the leak-detection fluid (salt brine,
glycol, etc.) in the intermediate chambers of double-walled tanks. It reports over- and under-
shooting of adjustable thresholds. VISY-Stick Interstitial can be used as a "dry sensor" which
detects the penetration of a liquid into the intermediate chambers of double-walled tanks. The
sensor is available for riser installation and for installation with screw-in unit.
Figure 9: VISY-Stick Interstitial
Dimensions in mm
Pr
obe l
eng
th
Pr
obe l
eng
th
M12 coupling
1 brown +
2 white A
3
blue –
4 black B
Equipotential bonding
connection
Probe head
Riser installation kit
(centring aid 3”/4”)
Screw-in unit R1½, AF
55, brass
Probe tube
∅
12
Product float
∅
43 x 43
Circlip
Riser installation
Installation with screw-in unit
Ø 47.2
appr
. 1
23
Ø 47.2
appr
. 1
23
