Brooks Instrument manufacturers solutions for flow, pressure, and level measurement solutions

Overview

The unique Brooks Seal Free Pressure (SFP) transmitter provides excellent pressure measurement on high purity fluids. Unlike other high purity pressure transmitters, the SFP pressure transmitter is constructed using a single piece perfluoroalkoxy (PFA) sensing chamber that does not use any seals. Because the only fluid-wetted surface is PFA, the possibility of fluid contamination is eliminated.

• No-seal design eliminates fluid contamination sources
• All PFA flow path
• Extremely strong sensor/PFA bond
• Versions available for ultra-high purity water, chemicals, acids, and bases
• Single-ended and flow-through versions available
• Integrated vapor leak indicator
• Not damaged by sub-atmospheric process conditions
• Temperature compensated output

Products

Polymer Pressure Transmitter

Brooks® Seal Free Pressure (SFP) transmitter is designed to measure the pressure of high purity fluids. It comes in two versions, the WA designation is for measuring ultrapure water and the CA designation is for measuring ultrapure chemicals, acids and bases.

The heart of the transmitter is an injection molded, single piece, pressure vessel fabricated from high purity Perfluoroalkoxy (PFA) plastic. The design allows the PFA diaphragm to be thick, while still providing pressure sensitivity and insuring process safety. The thick diaphragm virtually eliminates the possibility of corrosive ions diffusing from the process fluid. Injection molding provides a very smooth surface finish to maintain fluid purity. No elastomers are used to seal the pressure sensor from the process fluid. The benefit is increased fluid purity since elastomers can be a possible contamination source in ultrapure fluids. There are no potential fluid leak paths to the outside in this innovative design.

Specifications

Pressure Transmitters

				Temp
Model	Type	Full Scale Capacity	Accuracy	C	F	Output	Power Supply
SFP33WA	Flow Through - Ultra Pure Water	0-15 psig up to 0-150 psig	±1% FS	15-40	59-104	4-20 mA	24 Vdc
SFP33CA	Flow Through - Chemicals, Acids, Bases	0-15 psig up to 0-150 psig	±1% FS	15-40	59-104	0-5V, 1-5V, 0-10V	12-24 Vdc
SFP32WA	Single Ended - Ultra Pure Water	0-15 psig up to 0-150 psig	±1% FS	15-40	59-104	0-5V, 1-5V, 0-10V	12-24 Vdc
SFP32CA	Single Ended - Chemicals, Acids, Bases	0-15 psig up to 0-150 psig	±1% FS	15-40	59-104	0-5V, 1-5V, 0-10V	12-24 Vdc