Oxygen, Flow Rate Sensor

 Oxygen (±1.5%) 100ms response

Flow Rate ±0-10 L/min 0.1 L/min)

UART, LCD & Analog outputs

Operating temperature range –45 to +70ºC





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.


Powered by 8V to 35V / 7mA DC Power Supply, OCS1 provides UART & 0-5V O2 concentration & Flow Rate outputs. Thermal characteristics allow any Oxygen concentration measurement. No Flow Alarm output can serve to detect condition of No Flow.                                             



Text Box: info@dgflo.com


 4.6 x 0.8x 0.5” / 25g

O2 source select

J1.4 selects between O2 concentrator or 100% O2/Air mixer


 UART, LCD, Analog

Analog O2 output

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

Analog Flow Rate output

0 to 5V DC Linearly proportional to 0—10 L/min

Power Supply

 Unregulated 8V to 32V DC / 7 mA

Field Calibration

Oxygen & Flow rate DigiDISP controlled

 O2 Accuracy

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

O2 Range

 20.8% - 95.7%, 20.8% - 100%

Flow Rate Accuracy

±0.1 L/min

Flow Rate Range

±10 L/min

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

Flow  I/O

Bi-directional  via 1/8” male barbs

O2 Response Time

100 ms

Flow rate Response Time

 10 ms

USART Frame content

O2 [%], Flow Rate [L/min]

Flow  I/O

Bi-directional  via 1/8” male barbs

No Flow Alarm

J1.3—Open Drain


to other units of Flow

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