Scully Signal Company / Tel. 617 692 8600 / Fax. 617 692 8620 / 800 2 SCULLY (272 8559)
70 Industrial Way, Wilmington, MA 01887-3479, USA / sales@scully.com / www.scully.com
61211 Rev D
Scully Retained Product Sensor
Model SP-IR / Installation and Operating Instructions
APPLICATION
The Scully SP-IR Retained Product Sensor is designed to sense residual (retained) product in the bottom of a tank trailer
compartment. It is intended for use as part of the Scully Intelli-Check®Overll & Retained Product Monitoring System.
When properly installed at the lowest point in the compartment, using the Scully supplied weld coupling (or equivalent
mounting), the sensor will detect approximately 3/8"-1/2" of residual product in the compartment.
BUSHING INSTALLATION
The Scully weld coupling should be mounted at the lowest practical point in the tank compartment. In choosing a mount-
ing location, assure that there are no reective metal surfaces within 2” directly above the area where the sensor will be
installed. This will prevent the optic signal, which passes into the liquid when the sensor is immersed, from inadvertently
reecting back into the sensor and giving an erroneous dry indication.
The pilot diameter on the bushing is sized to t into a 1-1/8” hole in the tank shell. The larger straight diameter on the
bushing closest to the outside of the tank is intended to allow for a full penetration weld joint with no voids. Welding of the
bushing into the tank should be in accordance with all applicable industry regulations. We recommend that a pipe plug be
installed into the bushing prior to welding the bushing to the tank to prevent heat distortion of the bushing during welding.
Use an anti-seize/lubricant on the pipe plug to facilitate removal after welding.
SENSOR OUTLINE AND MOUNITNG DRAWINGS
Figure 1.
The outline dimensions of a typical Scully SP-IR Retained Product Sensor are shown below (Figure 1). The sensor is
designed to be installed into the supplied Scully weld coupling, or dimensionally equivalent user provided mounting
arrangement. Figure 2, on the following page shows the Scully weld coupling as properly installed into a typical tank
compartment. The dimensions shown in parenthesis are given for reference. The weld coupling material is type 6061-
T651 aluminum bar stock. It is supplied with a 1/2" NPT female pipe thread, tapped plus 2-3 threads deep to allow for a
minimum of 5 full threads of engagement between the sensor and coupling threads
MaxSafety®
SYSTEMS
Baseefa03ATEX0492X
1.) The apparatus enclosure is made from light metal which must be protected against impact friction.
Ex 86B2056X; Ex 862058X; Ex 86B2096X; BAS99ATEX1157X; Baseefa03ATEX0112X
1.) The ying leads should be mechanically protected and segregated from other electrical apparatus.
2.) The ying leads should be connected to terminals which are adequately separated from the terminals of other circuits.
The terminals should be located in an enclosure which provides a degree of protection of at least IP20.
'
'
'
'
2.53'
1/2' NPT
2.33'
(83.8 mm)
3.30'
(59.2 mm)
M20 X 1.50
2 PORTS
1'' (25.4 mm) HEX
(64.3 mm)
