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ST 3000 Smart Transmitter
Series 100 Remote Diaphragm Seals Models
34-ST-03-64 February 2009
STR12D 0-10 to 0-400 inH2O 0-25 to 0-1,000 mbar STR13D 0-5 to 0-100 psid 0-0.35 to 0-7 bar
STR14G 0-5 to 0-500 psig 0-0.35 to 0-35 bar STR17G 0-100 to 0-3,000 psig 0-7 to 0-210 bar
STR14A 0-5 to 0-500 psia 0-0.35 to 0-35 bar
In 1983, Honeywell introduced the first SmartPressure Transmitter― the ST 3000®. In 1989,
Honeywell launched the first all digital, bidirectional
protocol for smart field devices.
Today, its ST 3000 Series 100 Remote Seal
Transmitters continue to bring proven “smart”
technology to a wide spectrum of measurement
applications. Typical applications include high
accuracy level measurement in pressurized
vessels in the chemical andhydrocarbon
processing industries. A second application
consists of accurate flow measurement for
slurries and high viscosity fluids in the chemical
industry. Honeywell remote seal transmitters
demonstrate proven reliability in hundreds on
installations in a wide variety of industries and
applications with a wide variety of secondary fill
fluids for corrosive or high temperature processfluids.
All ST 3000 transmitters can provide a 4-20 mA
output, Honeywell Digitally Enhanced (DE)
output, HART® output, or FOUNDATION™ Fieldbus
output. When digitally integrated with
Honeywell’s Process Knowledge System™,
EXPERION PKS™, ST 3000 instruments provide
a more accurate process variable as well as
advanced diagnostics.
Honeywell’s high-performance ST 3000 S100
transmitters lead theindustry in:
• Accuracy
• Stability
• Reliability
• Rangeability
• Warranty
Includes Lifetime™ Transmitters:
• Total Accuracy = ±0.0375%
• Stability = ±0.01% per year
• Reliability = 470 years MTBF
• Rangeability = 400 to 1
• Lifetime Warranty = 15 years
Figure 1—Series 100 Remote Seal Pressure Transmitters
feature proven piezoresistive sensors and advanced seal
technology withstandard weld connections.
The devices provide comprehensive self-diagnostics to help
users maintain high uptime, meet regulatory requirements,
and attain high quality standards. S100 transmitters are
ideal for critical applications, such as custody transfer of
natural gas and energy and material balances, where
accuracy and stability are of the utmost importance.
2 ST 3000 Smart PressureTransmitter
Description of Diaphragm Seals
Diaphragm seals are traditionally used when a standard pressure transmitter should not be exposed to the
process pressure directly. Diaphragm seals typically protect the pressure transmitter from one or more
damaging aspects of the process media. Consideration for using a diaphragm seal should be made in the
following circumstances.
• High ProcessTemperature
• Process Media is Viscous or Contains Suspended Solids
• Process Media is Subject to Solidifying
• Process Media is Corrosive
• Process Application Requires Sanitary Connections
• Process Application Subjects the Measuring Instrument to Hydrogen Permeation
• Tank Level Applications with Maintenance Intensive Wet Legs
• Tank Application with Density or Interface Measurements
•Measuring Instrument Requires Remote Mounting
The following diaphragm seals are standard from Honeywell (please call your local salesperson if you do not see
the product you need for your application):
Figure 2 - Flush Flange Seals can be used with
differential, gauge and absolute pressure transmitters
and are available with 3” ANSI Class 150, ANSI Class
300 and DIN DN80-PN40 process connections.Flush
flange seals can also be provided with Lowers.
Lowers are essentially calibration rings, which allow
flushing connections if needed.
Figure 2
Figure 3 - Flange Seal with Extended Diaphragm
can be used with differential, gauge and absolute
pressure transmitters and are available with 3” and 4”
ANSI Class 150, ANSI Class 300, DIN DN80-PN40
and DIN DN100-PN40 process connections. 2”,...
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