Datasheet

ManualsBrandsHONEYWELL ManualsSensorsPressure sensor 0 psi up to 5 psi

Model 1865 Series

DESCRIPTION

The Model 1865 is a high-performance transducer specifically

designed to address the needs of medical and specialized

OEM applications. Offering laser-trimmed compensation, the

Model 1865 may be specified to operate with either a

constant current or voltage supply.

The Model 1865 employs a solid state piezoresistive pressure

transducer mounted in a plastic package. For applications

where force is applied by a flexible membrane to the sensor,

such as found in infusion pumps, the Model 1865’s precision

height silicone diaphragm provides long life and is a reliable

replacement for older force or load cell transducers. Utilizing

a silicon rubber diaphragm, the 1865 is compatible with some

liquid media applications.

The Model 1865 provides access to important safety features

in critical care medical instrumentation, such as occlusion

pressure or infiltration detection. The pressure data can

provide medical personnel with useful diagnostic information

regarding the condition of the patient’s circulatory system.

These force/pressure transducers can also be used with other

medical dispensing devices, such as syringe pumps, to

improve safety and accuracy.

May be operated in either current or voltage excitation, the

Model 1865’s output can be amplified or signal conditioned,

as required. The semiconductor-based sensor offers high

resolution using its Wheatstone Bridge strain gauge design.

The height of the unit’s patented, poured-in-place silicon

rubber diaphragm is controlled to ensure sensitivity to low

pressure. This diaphragm is bonded to a plastic header and

transmits force applied through a special silicone gel to the

diaphragm of a silicon peizoresistive die. The back of the die

is exposed to atmospheric pressure, which results in a gauge

pressure output.

Force/Pressure transducer

FEATURES

• Silicon pressure/force interface diaphragm

• Force measurement for infusion pump applications

• Pressure measurement for liquid media

• Medical-grade materials

• 8-pin DIP electrical connection

• Laser trimmed

• Choice of voltage or constant current excitation

TYPICAL APPLICATIONS

• Infusion pumps

• Anesthesia monitors

• Non-corrosive, nonpressurized media-level sensors

• Ventilation systems

• Blood pressure equipment

• Syringe pumps

• Drug delivery systems

Summary of content (4 pages)

PAGE 1
Model 1865 Series Force/Pressure transducer DESCRIPTION The Model 1865 is a high-performance transducer specifically provide medical personnel with useful diagnostic information designed to address the needs of medical and specialized regarding the condition of the patient’s circulatory system. OEM applications.
PAGE 2
Model 1865 Series ELECTRICAL SPECIFICATIONS PHYSICAL SPECIFICATIONS Ratings Specification Input impedance Pressure over-range protection Current excitation 2.0 kOhm min. to 8.0 kOhm max. Voltage excitation 8.0 kOhm min. to 40 kOhm max. 3X span or 60 psi, whichever is least Media/materials compatibility Output impedance Top side Room atmosphere, directly Current excitation 3.5 kOhm min. to 6.0 kOhm max. applied force, and liquids Voltage excitation 3.5 kOhm min. to 6.0 kOhm max.
PAGE 3
Force/Pressure transducer REFERENCE CONDITIONS FIGURE 1. SENSING ELEMENTS Specification 8 Media temperature 2 27 °C ± 1 °C [80 °F ± 2 °F] Ambient temperature 27 °C ± 1 °C [80 °F ± 2 °F] 6 1 Vibration 0.1 G (1 m/s/s) max. Humidity 50 % ± 10 % Ambient pressure 12.8 psi to 16.5 psi [860 mBar to 1060 mBar] Excitation source 7 3 1.5 mAdc ± 0.0015 mAdc or 10.0 Vdc ± 0.01 Vdc Pin Connection Pin Connection 1 + Output 5 + Input 2 NC 6 - Output 3 - Input 7 NC 4 NC 8 NC FIGURE 2.
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ORDER GUIDE 1865 – G– D N Model Pr essur e Range Pressur essure WARRANTY/REMEDY SALES AND SERVICE Honeywell warrants goods of its Honeywell serves its customers through manufacture as being free of defective a worldwide network of sales offices, materials and faulty workmanship. representatives and distributors.