99.9%+ N₂
Trace-oxygen purity monitoring
High-purity nitrogen duty needs a sensor that resolves very small oxygen traces. The 0-1000 ppm oxygen range, listed as OC-38, is the model to start with.
Get this model quotedSpecifying a marine oxygen sensor for nitrogen generator duty usually comes down to one question: how much oxygen must the unit see? The OxysenZir oxygen sensor is supplied in three measuring ranges — 0-1000 ppm, 0-25% and 0-96% oxygen — so the range you choose decides which part number goes on the purchase order. Compare the three models below, then send us your range, thread and cable details for a quotation.
If you already know your nitrogen generator's oxygen duty, the answer is short. For trace-oxygen purity monitoring, use the 0-1000 ppm range listed as OC-38. For percent-level readings, use the 0-25% range listed as OC-39. For broad-range or inert-gas duty, use the 0-96% range listed as OC-40. Confirm the range-to-model pairing with our engineers, then check the table below.
Three models, three measuring ranges, three different duties. Read the range column first, then check the duty that matches your nitrogen system.
| Model | Measuring range | Duty it serves | Where it is usually fitted |
|---|---|---|---|
| OC-38 | 0-1000 ppm oxygen | Trace-oxygen monitoring where the reading sits in the parts-per-million band | Nitrogen generator purity lines on vessels that need a clean, low-oxygen supply |
| OC-39 | 0-25% oxygen | Percent-level oxygen measurement for generator and process gas | Day-to-day monitoring points where the gas is still rich in oxygen |
| OC-40 | 0-96% oxygen | Broad-range and inert-gas blanket duty | Inerting, purging and general gas-blanketing circuits on board |
The specification table on the product page lists all three measuring ranges in a single row. Confirm the range-to-model pairing with our engineers before ordering, and include your gas conditions with the enquiry so the part number is matched correctly the first time.
Start from the purity your nitrogen system has to hold, then follow the branch to the model. These purity bands are engineering guidance for instrument selection — confirm them with our technical team before you commit a part number to the order.
High-purity nitrogen duty needs a sensor that resolves very small oxygen traces. The 0-1000 ppm oxygen range, listed as OC-38, is the model to start with.
Get this model quoted
When readings stay inside the percent band, the 0-25% oxygen range listed as OC-39 matches the working span without over-specifying the instrument.
Get this model quoted
Inerting and purging circuits swing across a wide band. The 0-96% oxygen range listed as OC-40 covers that spread in one instrument.
Get this model quotedEverything below is common to the OC-38, OC-39 and OC-40, so it applies whichever range you order. Use it to check fitment against your installation before quoting.
| Product name | OxysenZir Sensor |
|---|---|
| Model | OC-38 / OC-39 / OC-40 |
| Measuring range | 0-1000 ppm oxygen (OC-38); 0-25% oxygen (OC-39); 0-96% oxygen (OC-40) |
| Measuring technique | Zirconia measurement technology |
| Electrical connection | 100 cm package cable |
| Response time | <10 seconds |
| Output | 0.49-0.55 mV, 1000 ppm; 3.98-4.05 mV; 4.98-5.05 mV |
| Mechanical connection | G1/8 inch thread |
| Service life | 3-5 years |
| Temperature range | -20 °C ~ +50 °C |
| Operating humidity | 0 ~ 99% RH does not condense |
| Pressure range | Atmosphere ±10% |
Work from the job the sensor has to do, not from the part number you last ordered. Each scenario below links an on-board duty to a specific line on the data sheet and to the decision you need to make.
Specification: measuring range 0-1000 ppm oxygen for trace-level work, with a response time under 10 seconds for real-time readings.
Buyer decision: fix the target purity of the generator first, then confirm the matching model and thread with our engineers before the purchase order is raised.
Specification: the sensor monitors oxygen concentration in the gas and sends an electrical signal to the ECU to help adjust the air-fuel ratio and reduce emissions.
Buyer decision: check what your control unit expects to read against the listed output values, and check the 100 cm cable against your panel routing.
Specification: 0-96% oxygen range, atmosphere ±10% pressure range, and a marine-grade housing that resists vibration, salt and humidity.
Buyer decision: choose the broad-range model when readings swing across the percent band, and confirm the temperature and humidity envelope of the location first.
Scenario guidance describes how the range and housing details are normally applied; it is not a substitute for the data sheet. Send us the gas conditions and we will confirm the model in writing before you order.
Send the details and our team will come back with bulk pricing and product details on the OxysenZir series.
Email: sales@fastmarine.cn
Phone: +86 139 2900 8160
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View productthe range decides the model. the series is listed with three measuring ranges: 0-1000 ppm oxygen, 0-25% oxygen and 0-96% oxygen. trace-oxygen purity monitoring suits the 0-1000 ppm range listed as oc-38, percent-level duty suits the 0-25% range listed as oc-39, and broad-range or inert-gas duty suits the 0-96% range listed as oc-40. confirm the range-to-model pairing with our engineers before ordering.
the sensor uses zirconia measurement technology and has a response time of under 10 seconds, which supports real-time, high-precision oxygen readings.
the mechanical connection is a g1/8 inch thread, and the sensor is supplied with a 100 cm package cable for the electrical connection.
the listed output values are 0.49-0.55 mv for the 1000 ppm range, 3.98-4.05 mv and 4.98-5.05 mv. check these against the input your control unit expects to read.
the series is rated for -20 °c to +50 °c, 0 to 99% rh non-condensing and atmosphere ±10% pressure, with a 3-5 year service life.
send your measuring range or model, thread details, cable and connector requirements, gas conditions and quantity by email to sales@fastmarine.cn or phone +86 139 2900 8160, or use the contact us page for bulk pricing and product details.
