TIME MARK is a division of
MODEL 456-15
Pressure Transducer
0 - 15 PSI pressure input
4-20mA output
High accuracy and repeatability
Welded 316 SS construction
Computer-tested and calibrated
Unique cable seal system
Fully temperature compensated
SPECIFICATIONS
DESCRIPTION
The Model 456-15 Pressure Transducer is designed
specifically to meet the rigorous environments
encountered in many level measurement applications.
This transducer provides repeatable, precise depth
measurements under the most adverse conditions. It
has been designed for installation in Class I, Division 1,
Groups A,B,C and D; Class II, Division 1, Groups
E,F,and G; Class III, Division 1 hazardous locations,
when connected to the appropriate Stahl apparatus.
The Model 456-15 features high performance internal
signal conditioning. An isolated diaphragm sensor has
been incorporated for use with hostile fluids and gases.
This sensor uses a silicon pressure cell that is fitted into
a stainless steel housing with an integral, compliant
stainless steel barrier diaphragm. The sensor assembly
is housed in a rugged, compact 316 SS case, which
provides for a variety of pressure inputs as well as
electrical output connections.
DIMENSIONS
Model 456-15
Pressure range 0 - 15 PSI
Static accuracy ± 1% FSO BFSL
Thermal error
Proof pressure 1.5 x rated pressure
Burst pressure 2.0 x rated pressure
Resolution Infinitesimal
Excitation 9 to 30VDC
Input current 20mA max.
Output current 4 - 20mA
Zero offset
Output impedance < 10 ohms
Insulation resistance 100 megohms at 50VDC
Circuit protection Polarity, surge/shorted output
Compensated temp +32º to +122º F
Operating temp range +14º to +140º F
Enclosure material 316 stainless steel
Mounting Suspended by cable
Weight 7 oz.
Cable
Agency Approvals Approvals to FM, CSA and UL are standard
other pressure ranges available upon request
Static accuracy includes the combined errors due to
nonlinearity, hysteresis & nonrepeatability on a “full
scale output” (FSO) “best fit straight line” (BFSL)
basis, at 25º C or 77º F, per ISA S51.1.
0.1% FSO/ºC worst case
Thermal error is the maximum allowable deviation
from BFSL due to a change in temperature, per ISA
S51.1.
4 - 20mA ± 0.12mA max.
30 feet; approx. 1.2 lbs. Polyurethane
jacketed shielded cable with polyethylene
vent tube and Kevlar tension members. 200
lbs. pull strength. 22 AWG conductors.
Approx. weight: 0.04 lb/ft. Tefzel jacket,
optional.
for Class I, Div 1, Groups A, B, C and D, and
Class II, Div 1, Groups E, F and G, and Class
III, Div 1 hazardous locations (install to
national & local codes w/ approved barrier).
Page 1 of 4 11/2011
© 2011 TIME MARK CORPORATION
TIME MARK is a division of
MODEL 456-15
Pressure Transducer
READ ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE.
KEEP THIS DATA SHEET FOR FUTURE REFERENCE.
GENERAL SAFETY
POTENTIALLY HAZARDOUS VOLTAGES ARE PRESENT AT THE TERMINALS OF THE MODEL 456-15.
ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.
THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.
Installation Instructions
APPLICATIONS
Suitable applications for the Model 456-15 Pressure
Transducer would include - well monitoring; lift stations;
dewatering; mobile containers; liquid level control;
process control; ground or surface water monitoring;
and pump control.
INSTALLATION
Most installations either suspend the Model 456-15
Pressure Transducer in a perforated 1 1/2” or 2” PVC
instrumentation still well, or attach the transducer to a
rigid conduit.
To install in rigid conduit: fit the transducer with a 1/2”
NPT male conduit fitting where the cable exits the
transducer. This fitting can then be mated to a
standard rigid conduit.
IN ALL INSTALLATIONS: Care should be taken in
the placement of the cable, as cable and vent tube
damage represents the most frequent causes of
transducer failure.
Connect the Model 456-15 Pressure Transducer as
shown in the appropriate unit diagram.
ADJUSTMENT
There are no adjustments to this device.
MOISTURE PROTECTION
Time Mark supplies a Vent Filter/Vapor Trap with each
Model 456-15 Pressure Transducer to ensure reliable
operation. This device protects sensitive electronic
components from mildew, corrosion and rust. It also
prevents the formation of a liquid column in the vent
tube, which would directly affect the calibration of the
Model 456-15 Transducer.
SIGNAL INPUT - Model 4042 Controller
SIGNAL INPUT - Model 4082 Controller
Page 2 of 4 11/2011
© 2011 TIME MARK CORPORATION
TIME MARK is a division of
MODEL 456-15
Pressure Transducer
MOISTURE PROTECTION - continued
The Vent Filter and Vapor
Trap connects to the
existing vent tube via a 10”
flexible tube (see fig 4).
The acrylic drying tube is 6”
in length and 3/4” in
diameter. Inserted in each
drying tube end cap is a 20
micron polypropylene filter.
The drying tube is filled with
30 grams of indicating
desiccant (drying agent).
As air passes through the
drying tube, moisture is
absorbed by the desiccant.
The desiccant changes from blue to red as its drying
capacity becomes diminished. The Vent Filter/Vapor
Trap can be exposed to air, industrial gases,
refrigerants, organic liquids and solvents. It should not
be used when ammonia is present.
The desiccant can be rejuventated after normal use by
spreading it in a layer one granule deep and heating it
for one hour at 400º F. The heating temperature is
critical, because if it is lower than 400º F, the desiccant
will not rejuvenate.
figure 4.
DRYING THE TRANSDUCER
If you get water in the transducer and vent tube, coil the
cable and place the cable and transducer in a pan.
Place the pan in an oven at 122º F or 50º C for 2 hours.
This on-site remedy may do the trick. Be careful that
the oven temperature does not exceed those given, or
else you may damage the tranducer and cable.
You may also try suspending the cable and transducer
in a vertical position, overnight, to allow the water to
drain from it.
CARE AND HANDLING
The Model 456-15 Pressure Transducer is designed for
rugged use, but it needs protection from overpressure
and sharp impact.
When lowering it into a liquid, penetrate the surface
slowly, and only to the depth necessary. Avoid
dropping the unit from above the surface. Clean the
transducer by rinsing it in a mild detergent.
Direct probing of the diaphragm or attempts to remove
the protective screens can damage the sensor.
WARRANTY
This product is warranted to be free from defects in
materials and workmanship for one year. Should this
device fail to operate, we will repair it for one year from
the date of manufacture. For complete warranty
details, see the Terms and Conditions of Sales page in
the front section of the Time Mark catalog or contact
Time Mark at 1-800-862-2875.
Page 3 of 4 11/2011
© 2011 TIME MARK CORPORATION
TIME MARK is a division of
MODEL 456-15
TYPICAL APPLICATION
Pressure Transducer
Model 456-15
Pressure Transducer
Page 4 of 4 11/2011
© 2011 TIME MARK CORPORATION
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