Product Roundup of pressure instrumentation devices

Waiting as fast as we can: Pressure instrumentation continues steady progress but promised sensor technology has yet to appear.

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PID Controller
The ER3000 Electropneumatic PID pressure controller has 0.1% accuracy of liquids or gases at outlet pressures from vacuum to 20,000 psi. Free Windows software allows a user to tune the PID parameters to optimize system response, download profiles, and collect system data. It has a weatherproof, corrosion-resistant NEMA 4X enclosure. An FM approved, explosion-proof version is also available. Tescom; 800/447-1204;

Miniature I/P
The IP610 electronic pressure regulator converts a 4–20 mA signal to a proportional pneumatic output. Applications include precision air pressure regulation to actuators, valves, positioners and other final control elements. An integral volume booster provides high flow capacity, increasing control speed in critical applications. Mountings include standard wall, panel, pipe or DIN rail. Price: $290. Omega Engineering; 203/359-1660;

Low-Profile Transmitters
Low Profile line of I/A Series pressure transmitters have compact sensor bodies, reducing the overall height of the transmitter and allowing use of process covers with process connections facing downward. The LP1 manifold-mount version installs directly on supported process manifolds. LP2 is also suitable for manifold mounting, but it can be bracket mounted on either a Foxboro or an existing Coplanar bracket. Both are available with three- or five-valve manifolds. Foxboro M&I Division; 866/746-6477;

Smart Pressure Transmitters
Cerabar S/Deltabar S pressure transmitters have a ceramic cell for aggressive conditions, self-monitoring differential pressure transmitter, and modular construction. The modular design includes replaceable displays, electronics, and sensor modules, reducing the cost of stocking spare parts and repair. An integrated data module allows for the back up of measured values every 20 seconds with an average stored every 15 min. Endress+Hauser; 888/end-ress;

Welded Gage Reduces Leaks
The Solfrunt 1981 process gauge has stainless steel internals and is mounted and welded onto a diaphragm seal. The diaphragm seal is available with 316L SS or Haselloy C wetted parts. The unit’s all-welded seal-to-gauge and seamless Bourdon tube provides fewer leak paths than previous units. Standard units have a female top for the instrument connection and a ½-in. NPT male bottom for the process connection. Ametek/U.S. Gauge; 215/355-6900;

Digital Barometer
The Barocap digital barometer has a pressure measurement range of 500–100 hPa and a temperature range of -40 to +60°C. It is available as a Class A barometer,  which is adjusted and calibrated against a deadweight tester with accuracy of 0.15 hPa, or a Class B barometer which is adjusted and calibrated using electronic working standards with accuracy of 0.25 hPa. Both have a NIST-traceable certificate. Vaisala; 781/933-4500 X1063;

Pressure Control  
The Series DH DigiHelic Differential Pressure Controller has 0.5% full scale accuracy on ranges from 5-in. w.c. to 100-in. w.c. It has a 4–20 mA process output, two SPDT relays with adjustable dead bands, and selection of pressure, velocity or flow operation. Dwyer Instruments; 800/872-9141;

Pressure Transducer Fits in Tight Spaces
Measuring 0.875 in. dia., the AST4100 pressure sensor fits in test stands and data loggers. It has stainless steel construction, making it suitable for use in corrosive environments including gas panels and pump and tank monitoring applications. The sensor provides gauge and compound gauge pressure measurement in pressure ranges from 0–10,000 psi. American Sensor Technologies; 973/398-9900;

OEM Transducer
Model 516 CVD industrial OEM pressure transducer has an all welded-stainless steel back end, 0.5% FS accuracy, a compensated temperature range of -5 to +180° F, and gauge or compound pressure ranges from -14.7 psi to +6,000 psi. It is available with a general purpose or IP65 wash-down enclosure and a variety of electrical connectors including heavy duty DIN connectors. Setra Systems; 800/257-3872;

Isolated Measurements
Series 42TL sensor uses a solid-state pressure transmitter that is completely isolated from the process fluid. The pressure transmitter senses gauge pressure for vented tanks and differential pressure for pressurized tanks. It can be calibrated for fluid density or specific gravity in any height tank, and is not affected by foaming, ice and other conditions. Red Valve; 412/279-0044;

Miniature Sensors
HPX Series pressure sensors are available in two package configurations: DIP gage sensor and SOIC (Small Outline Integrated Circuit) absolute sensor. Both sensor styles are non-amplified and non-calibrated, and have Wheatstone bridge construction, silicon piezoresistive technology and a ratiometric output. Pressure ranges are from 0–100 psi over an operating temperature range of -40 to +57º . Honeywell Sensing and Control; 800/784-3011;

Pressure Switches
The PS41 Series of pressure switches uses an internal piston to allow high proof pressure, while gaining sensitivity and accuracy from a diaphragm media interface. The diaphragm may be specified in Viton, neoprene or EPDM material. Repeatability is 2% of the full set point range of 3–100 psi with 350 psi proof pressure. Operating temperatures are -40° F to +180° F. Gems Sensors; 800/378-1600;

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