Dwyer SBLT2 User Manual
Series SBLT2 Submersible Level Transducer
6
-45/64
(
170.26)
Ø
1
(
Ø25.40)
1/2 NPT
S
UBMERSIBLE
C
ABLE
BREATH ER
TUBE
PRESSURE
TRANSDUCER
RED
BLACK
SHIELD
RECEIVER
mA
POWER
SUPPLY
13-30 VDC
Specifications - Installation and Operating Instructions
Bulletin L-28
The SBLT2 Sub mersible Level Tra nsducer is manu factured for
years of trouble free servic e. The transm itter con sists of a
piezo resis tive sens ing element, enca sed in a 316 SS hou sing.
Super ior l ightn ing a nd su rge p rotection utilizi ng du al ar resto r
technology, grounded to case, eliminating both power supply surges
and lightn ing ground s trike tran sients (surge protection is not
guaranteed and is not covered by warranty). Bu llet nose des ign
prote cts diaphr agm from damage. Come s equi pped with a 27 0pound tensile strength, shielded, vented cable. Ventilation tube in
the cable automatically compensates for ch anges in atmospheric
pressure above the tank.
APPLICATIONS
• Well monitoring; Ground water monitoring; Environmental remediation;
Surface water monitoring; Down hole; Water Tanks.
ELECTRICAL INSTALLATION
An external power supply delivering 13-30 VDC with minimum current
capability of 40 mA DC (per transmitter) is required to power the control
loop. See figure below for connection of the power supply, transmitter
and receiver.
The maximum receiver load resistance (RLmax) for the DC power
supply voltage (Vsup) is expressed by the formula:
RLmax = Vsup – 13V
0.02A
Shielded cable is recommended for control loop wiring.
SPECIFICATIONS
Service: Compatible liquids.
Wetted Materials: 316 SS, 316L SS, epoxy adhesive; Cable: Polyether
polyurethane or ETFE; Bullet Nose: PVC.
Accuracy: ±0.25% of full scale.
Temperature Limit: 0 to 150°F (-18 to 66°C).
Compensated Temperature Range: 0 to 140°F (-18 to 60°C).
Thermal Effect: Less than ±0.02%/°F.
Pressure Limit: 2X full scale.
Power Requirement: 13 to 30 VDC.
Output Signal: 4 to 20 mA DC, 2-wire.
Response Time: 50 ms.
Max. Loop Resistance: 850 ohms at 30 VDC.
Electrical Connections: Wire pigtail.
Mounting Orientation: Suspended in tank below level being
measured.
Weight: 2.2 lb (1.0 kg).
Electrical Protection: Lightning and surge protection.
WARNING:
A voltage potential between the ground wire of the unit and the ground
of other equipment can lead to electrolytic corrosion. Always ensure the
grounding system provides an equipotential between the transmitter and
the earthing ground connection. Avoid using the power system protective
ground since this will often have a significant potential difference to the
transmitter ground. Also note that dissimiliar metals in the ground system
may cause electrolysis corrosion of the transmitter or other components
in the ground system.
During installation, connect a voltmeter or ammeter between the shield
ground wire and the grounding connection. If there is a measurable
voltage or current electrolytic corrosion may be a serious possibility. If
there is a potential difference then some isolation system will be
required. Improper grounding may lead to damage or poor signal
integrity.
Model Number Guide
Example
Construction
SBLT
SBLT2
20
40
SBLT2-20-40
Bullet style submersible level
transmitter, Polyurethane cable
©Copyright 2013 Dwyer Instruments, Inc. Printed in U.S.A. 12/13 FR# M2-443430-50 Rev. 3
MERCOID DIVISION
DWYER INSTRUMENTS, INC.
P.O. BOX 258 • MICHIGAN CITY, IN 46360 U.S.A.
Range
Cable Length
Options
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: info@dwyer-inst.com
XXX
XXX
In psi (5000 psi maximum)
In feet (1500 feet maximum)
ETFE cable
ETFE
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