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Specification:
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OFS2 |
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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 and High Volumetric Flow rate sensor. OFS2 is powered by 8-35V / 14mA unregulated DC Power Supply. OFS2 provides: 0-5V DC proportional outputs; UART bit stream comprising: O2 concentration, Volumetric Flow Rate, temperature and operational hours. 4ms response is ideally suited for crisp flow rate measurement & closed loop control applications. 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 high Flow rate Oxygen Measurement applications. Flow direction Alarm output can serve to detect wrong direction of flow. .
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Dimensions |
4.6” x 0.8” x 0.5” / 45g |
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Oxygen types |
Controlled by J1.4 O2 concentrator or air mixtures with pure O2 |
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Outputs |
UART, LCD, Analog |
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Analog Flow output |
0 to 5V DC Linearly proportional to 0—500 L/min |
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Analog O2 output |
0 to 5V DC Linearly proportional to 0—100% O2 |
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Power Supply |
Unregulated 8V to 32V DC / 14 mA |
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Display Switch |
Performs Field Calibrations & Toggles between O2 & Flow on DigiDISP |
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O2 Accuracy |
±1.5% @ –5 to +45°C; ±2% @ -45°C to –5°C, 45°C to +70°C |
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Flow Resolution |
±1 L/min |
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O2 Range |
20.8% - 95.7%, 20.8% - 100% |
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Max pressure |
30 psig |
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Thermal change response |
1 oC/min |
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Thermal Gradient max |
50 K/m |
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Operating Temperature |
-45 to 70°C |
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Survival Temperature |
-85 to +85°C |
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RS232 transmit Rate |
200 bytes/sec @ 19200 bits/sec |
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Calibration Retention |
More than 10 years |
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Calibration |
Factory. Optional field calibration is provided. |
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Flow I/O |
Bi-directional via 1/2” male barbs |
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Response Time |
4 ms |
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UART Frame content |
O2 [%], Flow Rate[LPM], Temperature[°C], Hours of operation |
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10Hz Square wave output |
J1.6 5V P-P |
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Flow Direction Indicator |
J1.3—Open Drain |
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Long term display & save |
Via DigiTEST |
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Converting to other units of Flow |
How to convert Volumetric Flow to other units of Flow Rate, such as gal/min, SLPM |