The LD300 Pressure Transmitter Series present a robust solution for measuring pressure in demanding situations. Besides, this pressure transmitter is based on a field-proven sensor using capacitive technology to measure pressure.
The sensor is surrounded by two thick flanges to provide strength, longevity and extra protection for high pressure applications. Time has proved that this technique allows the capacitive sensor to provide extended reliability,with longtime stability and high performance to the smart pressure transmitter.
- Differential, Gage and Absolute Pressure – LD301, LD302 e LD303:
The models LD301, LD302 and LD303 offer digital communication based in HART®, FOUNDATIONTM fieldbus or PROFIBUS PA – protocol, simplifying calibration and providing remote diagnostics. Their microprocessor-based electronic circuit allows for total interchangeability of the electronics with the SMAR capacitive sensors.
Differential Pressure - LD300D and LD300H
Pressure is applied to high and low sides and differential pressure is measured. High static pressure is supported by LD300H models.
Flow - LD300D and LD300H
The differential pressure is generated by a primary flow element and th e square root function computes the flow measurement.
Absolute Pressure - LD300A
The pressure is measured at the high side of the transmitter and the low side is at zero absolute reference to a sealed chamber with vacuum.
Gage Pressure - LD300M
The pressure is measured at the high side of the transmitter and the low side is open to the atmosphere, providing true local atmospheric reference.
Level - LD300L
The transmitter has a flange mounted unit for direct installation on vessels. Extended diaphragms
are also available. For closed tank low side can compensate for built tank pressure pressure.
Sanitary LD300S Series
They are specially designed for food and other applications where sanitary connections are required. With threaded or “tri-clamp” connections, it allows for easy and quick maintenance and cleaning. Tri-clamp and other connections are compliant to 3A-7403 standard for food grade applications.
For further information, see the Smar SR301 Series Catalog.
LD300 Exploded View
Pipe and Tank Insertion
Built-in PID Controller
Flow and Totalization
Other Protocols Avail.
SR301 REMOTE SEALS
SPECIFY A SR301 REMOTE SEAL FOR ANY TRANSMITTER IN THE LD300 SERIES
SR301 is a remote seal designed for chemical and thermal isolation. LD300 Series can be assembled with separate diaphragm seals in either one or both sides of the sensor. SR301 options include: “T” Type Flanged (SR301T), Threaded (SR301R), Pancake (SR301P) where those three models with an optional flush connection, Sanitary (SR301S), Flanged with Extension (SR301E) and Pancake with Extension (SR301Q).
The flush connection enables deposits removal without disconnecting the seal.
Typical applications for remote seals:
Corrosive process fluid;
Suspended solids or viscous process fluid;
Process fluids that may freeze or solidify;
Process temperatures higher than supported by transmitters;
Replaces impulse lines and condensate legs;
See the Smar SR301 Series catalog for further information regarding application and specification.
WE OFFER A COMPLETE LINE OF MANIFOLDS FOR THE TRANSMITTER INSTALLATION
Manifolds are an important part of a Pressure transmitter installation once they facilitate maintenance, scheduled calibration, and replacement with the minimum interference in the process.
We offer a complete line of manifolds for your application. Please consult us to understand the options and learn how to specify them according to the application.