The Validyne DR800 Draft Range Pressure Transmitter is designed exclusively for very low industrial differential pressure measurements. It has a true full scale as low as +/-0.25 In H2O without turndown or over-amplification. Spans as low as 0.1 In H2O are possible with standard models. Zero elevation and suppression adjustments allow calibration over the precise range of interest. The DR800 offers 0.5% FS accuracy and an operating temperature range of -20 deg F to +185 deg F. The total combined temperature effects are less than 3% per 100 deg F.
Simplified zero and span adjustments provide a smooth and accurate calibration even for extremely low differential pressures. Using a 20-turn potentiometer adjustment and a circuit board jumper ranges can be selected from -100% elevation to +85% zero suppression. The span adjustment has a hi/lo jumper to allow faster full scale calibration.
The DR800 provides an industry-standard 4-20 mA analog signal using any power supply from 12 to 45 Vdc. FM-approved models for intrinsically safe service are available. Reverse polarity and short circuit protection is included. Electronic damping with a selectable time constant from 0.25 to 8 seconds smoothes noisy pressure signals. A loop-powered LCD local indicator is an available option.
The DR800 Conforms to Industrial Standards:
- Gasketed, threaded covers on NEMA 4 enclosure
- Dual electrical cavities to separate the field wiring from the electronics
- 2-1/8 inch centers on pressure connections
- 410 SST wetted parts
Applications:
- Steel Mill Re-Heat Furnace Draft Control
- Glass Furnace Air Flow Control
- Ceramics Furnace Control
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The Validyne Model P55 is a compact Differential Pressure Transmitter designed for industrial measurement applications. The variable reluctance sensing technology allows the P55 to be used in a wide variety of low pressure measurements where fast dynamic response, high resistance to vibration and superior signal stability through ambient temperature change is required. The P55 will accept liquids and gases directly at the sensing diaphragm; there are no internal fill fluids to slow the sensor response or cause excessive temperature shift.
The P55 is available in three output configurations: 4-20 mA current sink, +/-5 Vdc and isolated +/-5 Vdc outputs. The 4-20 mA output is a true two-wire system and will operate over any power supply from 9-55 Vdc.
The P55 is also available in an absolute pressure version with a welded variable reluctance sensor. Zero and span controls are available for external adjustment, and the wiring may be via connector or pigtail leads options. The P55 housing is rated NEMA 4.
Applications for the P55 include:
- Liquid level Measurements
- Hydraulic Flow and pressure
- Vehicle Testing
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The Validyne Model P365 is a compact high line Differential Pressure Transmitter designed for industrial measurement applications. The variable reluctance sensing technology allows the P365 to be used in a wide variety of low differential pressure measurements at high static line pressures with a minimum of zero shift. In addition, the P365 has high resistance to vibration and superior signal stability through ambient temperature change. The P365 will accept liquids and gases directly at the sensing diaphragm; there are no internal fill fluids to slow the sensor response or cause excessive temperature shift.
The P365 is available in three output configurations: 4-20 mA current sink, +/-5 Vdc and isolated +/-5 Vdc outputs. The 4-20 mA output is a true two-wire system and will operate over any power supply from 9-55 Vdc.
The P365 can measure full-scale differential pressures as low as +/-5 psid at static line pressures as high as 10Kpsi. Zero and span controls are available for external adjustment, and the wiring may be via connector or pigtail leads options. The P365 housing is rated NEMA 4.
Applications for the P365 include:
- Hydraulic Flow and Pressure Measurement
- Vehicle Brake Testing
- Oilfield Core Permeability Testing
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Validyne's new Model P2 Pressure Transducers provide a low cost solution for pressure measurement in a wide variety of industrial and OEM applications. With a rugged design and stainless steel wetted parts, they feature superior performance at a reasonable price. Units are offered with a high level output of 4 to 20 mA or 0 to 5 Vdc. The P2 has a standard 1/4" male pipe thread connection, and comes with a mating DIN electrical connector for fast wiring. Model P2's superior performance is assured through the use of chemical vapor deposition strain gage technology. Sensors are produced on wafers in large batches by depositing silicon dioxide and polysilicon on a stainless steel substrate, resulting in a strong, reliable design. The transducers are accurate to 0.25% and have excellent long-term stability. They resist shock and vibration and are compensated for -4 to +176 F ambient environments.
Applications for the P2 include:
- Pumps and Compressors
- Hydraulic Systems
- Refrigeration
- Pneumatic Systems
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The PS309 is a portable, completely self-contained Digital Pressure Manometer that is available in absolute, gage and differential ranges. In addition to the front panel liquid crystal display, the unit provides a +/-2 Vdc analog output suitable for use with chart recorders and digital data loggers. The PS309 includes a variable reluctance pressure transducer, all supporting circuitry and a 3.5 digit LCD display calibrated in engineering units. The unit operates on six 1.5V penlight cells for truly portable operation.
The transducer will accept liquids and gases and features 410 sst wetted materials for resistance to corrosive fluids. The calibration is unaffected by the dielectric properties of the media. Gage and differential pressure transducers may be re-ranged by disassembly, changing of the sensing element and recalibration. Individual meter scaling adjustments are provided as well as transducer zero and span adjustments. Decimal points are programmable by internal jumpers.
Applications for the PS309 include:
- Flow Element Calibration
- Portable Gage Pressure Measurement
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