Model 168

Pressure Transmitter

Differential pressure sensor/transmitter

Pressure medium: air or other non-conductive gas

Accuracy: ±1.0%,±0.4%,±0.25%

Range: unidirectional: 25 Pa to 25000 Pa/bidirectional: ±10 Pa to ±10000 Pa

Signal output: 4-20mA, 0-5Vdc, 0-10Vdc

Overload: Forward and reverse 15PSL (100KPa)

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General Description

The core component of the Model 168 series differential pressure
sensor/transmitter is a capacitive pressure sensor, which consists of a
stainless steel diaphragm with a fixed electrode forming a capacitor
whose value varies with pressure. Using the company's special patented
technology carefully designed sensor sensors and unique detection
circuit to ensure good temperature performance and long-term stability
of the product.

The Model 168differential pressure
sensor/transmitter can be used to measure differential or gauge pressure
with outputs of 0-5V, 0-10V, 4-20mA, and can also be customized for
other outputs. The accuracy of Model 168 was ±1.0%FS, 0.4%FS or 0.25%FS
at room temperature. The temperature compensation ranges from 4 ℃ to
77℃, and the temperature effect is less than ±0.05%FS/℃.

Model
168 has excellent performance-price ratio, widely used in HVAC,
environmental pollution control, clean engineering, medical instruments
and equipment, oven pressurization and furnace pressure control, natural
gas, gas pipe network monitoring, underground ventilation and power
plant wind pressure monitoring and other fields.

Features

The positive/negative pressure end can withstand at least 100kPa overload without damage

With temperature compensation capacitive sensitive element, to ensure the transmitter excellent movement State/static temperature performance

Multiple pressure interfaces/output forms/installation modes are optional

True zero output of voltage

Asymmetrical bidirectional differential pressure range is optional

Full protection of misconnection

Meet the CE standard

Environmental protection design, in line with ROHS standards

Minimum pressure range of 10Pa

Technical Data

Parameter	Standard	Special selection	Special selection
Accuracy RSS*（under constant temperature）	±1.0%FS	±0.40%FS	±0.25%FS
nonlinearity（best fitting line）	±0.97%FS	±0.37%FS	±0.24%FS
lag	±0.20%FS	±0.10%FS	±0.05%FS
non-repeatability	±0.10%FS	±0.10%FS	±0.05%FS
Temperature effect
Zero point/Full range offset(/℃)	±0.05%FS	±0.03%FS	±0.02%FS
Compensation range	4℃ to 77℃
Maximum static pressure	15PSI(100kPa)
Overload	Both positive and negative are 15PSI(100kPa)
Stability ratio	±0.5% FS/YR
Preheat	5 seconds to reach the performance specification
Installation position effect	When factory calibration, the sensor is placed vertically. In order to ensure accuracy, necessary fine tuning should be made when installing other positions at zero point

Environmental and mechanical parameters
Operating temperature	-18℃ to 77℃
Storage temperature	-40℃ to 85℃
Electrical connection	Pluggable terminal with PG-9 or PG-7 cable locking device
Pressure connection	3/16"、φ8、φ6.5 brass tower pressure connection(optional)
Output regulation	remove the terminal cover to fine-tune zero/full range
Pressure medium	Air or other non-conductive gas
Shell	Die cast aluminum (RoHS standard)
Weight	330g
Installation	The installation size is shown in the attached figure 1. Two 4.2mm diameter mounting holes in the shell are provided with two M3 X 6 mounting screws. There are other options for installing the bottom plate.