Vaisala PDT101 Differential Pressure Transmitter


  • 2 pressure ranges (Pa and inH2O)
  • DIN rail, panel or wall mountable
  • ¼” brass tubing connections
  • Euro style detachable connector
  • LED status indicator
  • Accessible zero and span adjustment potentiometers
  • Specially designed for critical and regulated environments
  • Measurements traceable to international standards

Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

Vaisala PDT101 differential pressure transmitter is made for challenging cleanroom applications in life science and high-tech fields. It’s perfect for use with the Vaisala viewLinc Continuous Monitoring System, tracking crucial environmental conditions in regulated settings. Each PDT101 model has zero and span adjustment screws, easily accessible from the front of the unit.

Key Benefits

Easy to install

Easy mounting on a wall, DIN rail or panel. The transmitter’s has a compact design and is well suited for monitoring cleanrooms and adjacent corridors with LED indicator lights for quick and easy power status checks.

Simplified compliance
As part of the Vaisala viewLinc monitoring system, Vaisala PDT101 is ideal for regulated environments where continuous, documented and redundant data is a requirement.

Precision and flexibility
The sensor enables precise measurement and control in high performance cleanrooms. Vaisala PDT101 transmitter is available with voltage output (3-wire) or current output (2-wire).


Vaisala PDT101 is perfect for cleanroom environments in industries like life science, semiconductor, and electronics. It’s part of the viewLinc system, great for regulated settings where continuous, documented, and redundant data is needed to meet FDA rules. Its small size fits well in cleanrooms or adjacent corridors, and LED lights show power status for quick checks.


Measurement Performance
Measurement ranges (bidirectional) ±60 Pa
±0.25 in H2O
Accuracy (incl. non-linearity, hysteresis, repeatability and zero/span calibration settings) 0.4 % span
Long-term stability ≤ 0.5 % span/year
Response time (10 … 90 %) 250 ms
Warm-up time 15 s
Compensated temperature range (+2 … +54 °C)
(+35.6 … +129.2 °F)
Temperature dependence ±(0.065 Pa + 0.054 % of reading) / °C
or ±(0.00015 in H2O + 0.03 %
of reading) / °F
(reference 21 °C or 70 °F)
Pressure type Differential, gauge, vacuum and
Proof pressure
Burst pressure
Static pressure
1.0 bar
1.7 bar
1.7 bar
Mounting position
Error (zero adjustable) ≤ 1 %/g (calibration in vertical position
is standard)
Adjustments (front accessible)
±5 % span
±3 % span
Operating Environment
Operating temperature (−18 … +70 °C) (−0.4 … +158 °F)
Storage temperature (−40 … +82 °C) (−40 … +179.6 °F)
EMC compliance EN 61326-1, Basic immunity test
Note: If used in an electromagnetic field of 3 V/m, with narrow frequency area of 80 … 120 Mhz, it is possible that the current output of PDT101 can deviate max. 0.8 % (with accuracy specified 0.4 %).
Mechanical Specifications
Medium (measured gas) Clean and dry air, non-conducting and
non-corrosive gases
Mounting Threaded fastener for wall mounting
or DIN rail type EN50022
IP rating IP40
Weight 0.07 kg
Process connection
Sensor element
Silicon, aluminium, glass
NEMA type 1 fire-retardant ABS 1
(meets UL94-5VA)
Inputs and Outputs
Process connection 1/4″ barbed fittings
Max. loop resistance for 4 … 20 mA ≤ (Supply voltage – 12 V)/0.022 A
Supply current Max. 20 mA for 4 … 20 mA output
Optical process diagnostics LED visual indicator
Electrical connection Euro style pluggable terminal block
accepts 12 … 26 AWG wire
(0.13 up to 3.31 mm2)
Output Signal
4 … 20 mA
0 … 5 VDC
(user selectable 0 … 10 VDC)
Operating voltage
2-wire output 4 … 20 mA
3-wire output 0 … 5 VDC
3-wire output 0 … 10 VDC
12 … 36 VDC
11.5 … 36 VDC
14 … 36 VDC or 24 VAC


Vaisala-PDT101-Differential Pressure Transmitter_DpstarGroup