Advantages
􄤎High precision pressure transmitter for
industrial applications
􄤎All stainless steel 316 construction
􄤎Measuring ranges from 0.1 to
350kgf/cm2
􄤎Advanced piezoresistive silicon
measuring cell
􄤎Excellent accuracy and long term
stability
􄤎300% proof pressure
􄤎Various choice of electrical connection
Applications
The transmitters can be used for a wide
range of applications in process control,
automatic machinery and
hydraulic or pneumatic system design.
􄤎Standard hydraulic and pneumatic
equipments
􄤎Freon and ammonia refrigeration
􄤎Machine tools and automatic
machinery
􄤎Flow control
􄤎Oil and off-shore industry
􄤎Equipments for chemical and
petrochemical industry
􄤎Engine monitoring and control
􄤎Fire fighting equipments and braking
systems for railway

P120 series pressure transmitter is a signal conditioned
media-isolated high precision pressure transmitter that
can be used for a wide variety of applications. The
transmitter has a water resistant, stainless steel housing
for complete protection from harsh environments.
Its 4~20mA current output is ideal for remote monitoring
of both primary and secondary process variables. It has
been designed as an advanced device for measuring
pressure of gases and liquids in industrial applications. It
is extremely versatile and suitable for measuring dynamic
or static pressure. The transmitters are available as
absolute and relative pressure types with either 2-wire
current or 3-wire voltage output.
The pressure to be measured acts through thin corrosion
resistant stainless steel 316L diaphragm on a silicon
measuring element. The pressure transmitting medium is
silicon oil. The measuring element contains diffused
piezoresistive resistors which are connected into a
Wheatstone bridge. The output signal of this bridge is
temperature compensated and converted into a
standardized current or voltage output signal.

Technology Piezoresistive silicon pressure sensor
Pressure ranges 0~0.1 to 350kgf/cm2 relative pressure
0~1 to 350kgf/cm2 absolute pressure
Pressure reference Gauge, absolute, vacuum and compound
Overload 3×full scale without damage
Current output Voltage output
Electrical connection type 2-wire technique 3 or 4-wire technique
Full scale output signal 20mA ±0.05% 5V ±0.05%
Zero measured output 4mA ±0.03% 1V ±0.03%
Other signals available on request
Excitation voltage 12~36V DC
Load resistance max@24V 500Ω at 24V
Influence of excitation 0.01% FSO/V
Power ripple ≤500mV P-P
Reverse polarity Protected
Shock resistance No change in performance after 10Gs for 11ms
Vibration 0.1G (1 m/s/s) maximum
Response time(10~90%) ≤2 milliseconds
Adjustment ±10% FSO/zero and span
Accuracy ≤±0.25% FSO
Non-linearity ±0.99% FSO typical
Repeatability ±0.015% FSO typical
Pressure hysteresis ±0.010% FSO typical
Long term stability ±0.3% FSO over 6 month
Cutoff frequency(-3 d B) ≤2kHz
Reference temperature 35°C
Operating temperature range -40~125°C
Compensated temperature range 0~82°C
Thermal sensitivity shift ≤±0.2%FSO in reference to 35°C typical
Thermal zero shift ≤±0.2% FSO in reference to 35°C typical
Thermal hysteresis ≤±0.1% FSO in reference to 35°C typical
Process connection PT1/4″, PT3/8″, PT1/2″male thread
PF1/4″, PF3/8″, PF1/2″male thread
Female thread & other connections available on request
Process media Gases and liquids compatible with stainless steel 316
Materials wetted by process Diaphragm : Stainless steel 316L
Housing : Stainless steel 316
Gasket O-ring : Viton (HNBR, CSM, etc.)
Enclosure rating IP65
Explosion protection Ex d IIC T6(P129)
Influence of mounting position Not critical but 0.1 to 0.5bar should be mounted vertically
Weight Approx. (270g)
Options Sealed diaphragm with thread connection
Sealed diaphragm with flange mounting
Siphon tube
Sealed diaphragm with capillary
Note : ① Cable version : 1.5m standard length, 4-wire, shielded with integral vent tube
② Vented gauge units must breathe dry, non - corrosive gases.
③ Connector version is vented through the removed pin, cable versions are vented through a vent tube inside
the cable sleeve