1. Oxygen Concentrator sourced O2 mixture. (J1.4 open)

2. Medical/Hospital Ventilator Oxygen/Air mixer sourced O2 mixture. (J1.4 Set to GND)

In circuit configurable to measure the Oxygen content in one of these gasses.


Ultra fast and miniature - Oxygen, Volumetric Flow rate and pressure sensor. MPS1 is powered by 8V to 35V / 14mA unregulated DC Power Supply. MPS1 provides: 0-5V DC proportional outputs; UART bit stream comprising: O2 concentration, Volumetric Flow Rate, Gauge Pressure, temperature and operational hours. 4ms response is ideally suited for crisp flow rate measurement & closed loop control. Time constant, bi-directionally stable response enables detection of Start of Breath and calculation of  spirometry parameters. Thermal characteristics allow  automotive, high altitude and other Oxygen Measurement applications. Flow direction Alarm output can detect wrong direction of Flow.            






                 MPS1 (Multi Parameter Sensor)

  Oxygen (±1.5%)

Flow rate ±0-20 L/min 0.1 L/min)

Gauge Pressure (±0.5%FS)

4ms response

UART, LCD & Analog outputs

Operating temperature range –45 to +70ºC


Text Box: info@dgflo.com


 4.6 x 0.8x 0.5” / 25g

Oxygen types

Controlled by J1.4 O2 concentrator or air mixtures with pure O2


 UART, LCD, Analog

Analog Flow output

0 to 5V DC Linearly proportional to 0—20 L/min

Analog O2 output

0 to 5V DC Linearly proportional to 0—100% O2

Analog Pressure  output

0 to 5V DC Linearly proportional to 0—20 psig

Power Supply

 Unregulated 8V to 32V DC / 14 mA

Display Switch

Performs Field Calibrations & Toggles between O2, Flow and Pressure on DigiDISP

 O2 Accuracy

 ±1.5% @ –5 to +45°C; ±2% @ -45°C to –5°C,  45°C to +70°C

Flow Resolution

±1 L/min

O2 Range

 20.8% - 95.7%, 20.8% - 100%

Max pressure

 30 psig

Thermal change response

 1 oC/min

Thermal Gradientmax

50 K/m

Operating Temperature

 -45 to 70°C

Survival Temperature

-85 to +85°C

RS232 transmit Rate

200 bytes/sec @ 19200 bits/sec

Calibration Retention

 More than 10 years


Factory. Optional field calibration is provided.

Flow  I/O

Bi-directional via 1/8” male barbs

Response Time

 4 ms

UART Frame content

O2 [%], Flow Rate, Absolute Pressure, Temperature[°C], Hours of operation

10Hz Square wave output

J1.6 5V P-P

Flow Direction Indicator

J1.3—Open Drain

Long term display & save

Via  DigiTEST


to other units of Flow

How to convert Volumetric Flow to other units of Flow Rate, such as gal/min, SLPM