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TecMicro O2-Oxygen Sensors

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TecMicro O₂-Oxygen Sensors are chemical gas sensors capable of measuring oxygen levels ranging from a few parts per billion to 100% O₂ by volume in ambient air or liquid, depending on the specific model.

These gas detection solutions are highly sought after in breweries, modified atmosphere packaging, head-space gas testing, bio-incubators, respirometers, and algae or aquatic applications.

Features

ATEX II approved for use in explosive atmospheres
Fast and accurate
Measure oxygen level in gas or liquid models
Measure from 0 ppb to 100% oxygen (depending on the model)
Optical sensor not sensitive to hydrogen or CO₂

As it is all stainless steel, the TecMicro O₂ oxygen Sensors can be used in clean-in-place (CIP) and sterilize-in-place (SIP) applications like incubation, brewing, or in the pharmaceutical or food processing industries. The sensor can withstand high temperatures, high pressure, cleaning agents, and anti-bacterial compounds.

Models

The following variants have a 5 VDC converter and an RS485 to USB connector, enabling direct communication between the sensor and the free GasLab software. A 1/2" fine thread connector is readily available in stock, while other connectors can be provided upon request.

Gas Models

TS-402: Low: 0-5%
TS-403: Medium: 0–22%
Trace: 0-2,000 ppm for TS-401
High Range: 0–100% for TS-404

Liquid Models

TS-408: High Range: 0–40 mg/L
TS-407: Medium: 0–10 mg/L
TS-406: Low: 0-2,000 ppb (2 mg/L)
Trace: 0-200 ppb, TS-405
All versions are compatible with the TS-101 Stainless Steel 1/2" Calibration Gas Tee

Specifications - All

Average LED Lifetime: 10,000+ hours
Cleaning: No organic solvents, 40% EtOH
Connection: ½“ stainless steel hex nut
Data Interface: RS485 non-Modbus
Data Output: digital USB or RS485 non-Modbus
Dimensions: 12 mm x 60 mm (½“-connector)
Materials touching sample: St.1.4404/PTFE/Glass
Manufacturer's recommended service interval: 3 years
Power supply: 5 VDC
Protection: IP65
Pressure compensation: STP by default. Change in software
Sensor cap replacement interval: 12 months or more
Recommended zero-point calibration interval: 3 months
Temperature compensation: -4 °C-40 °C (39 °F-104 °F)
Temperature range: -10 °C-60 °C (14 °F-140 °F)

Specifications - Models

TS-401 Trace Gas: 0-2,000 ppm

Accuracy 1000-2000 ppm: ± 4% MV
Accuracy 100-1000 ppm: ± 3% MV
Accuracy 0-100 ppm: ± 2% MEV
Response Time at 25°C: <15 seconds
Resolution: 1 ppm
Maximum Pressure: 5 bar
Expected cap lifetime: 1 year

TS-402 Low Range: 0-50,000 ppm (5%)

Accuracy 2.5-5%: ± 2% MV
Accuracy 0.5-2.5%: ± 2% MV
Accuracy 0-0.5%: ± 2% MEV
Response Time at 25 °C: 5 seconds w/o protective layer
Resolution: 0.001%
Maximum Pressure: 5 bar
Expected cap lifetime: 2 years

TS-403 Standard: 0-220,000 ppm (22%)

Accuracy 15-22%: ± 3% Mev
Accuracy 5-15%: ± 3% Mev
Accuracy 0-5%: ± 2% Mev
Resolution: 0.001%
Response Time at 25 °C: 5 seconds w/o protective layer
Maximum Pressure: 5 bar
Expected cap lifetime: 2 years

TS-404 High Range: 0-100%

Accuracy 22-100%: ± 5% MV
Accuracy 5-22%: ± 4% MV
Accuracy 0-5%: ± 3% MEV
Resolution: 0.001%
Response Time at 25 °C: 0.5 seconds w/o protective layer
Maximum Pressure: 5 bar
Expected cap lifetime: 2 years

TS-405 Trace Liquid: 0-200 ppb

Accuracy: 0-200ppb: ± 2% MEV
Resolution: 1 ppb
Response Time at 25 °C: <20 seconds
Maximum Pressure: 20 bar
Expected cap lifetime: 1 year

TS-406 Low Range: 0-2,000 ppb (0-2 mg/L)

Accuracy: 1000-2000 ppb: ± 2% MV
Accuracy: 200-1000 ppb: ± 2% MV
Accuracy: 0-200 ppb: ± 2% MEV
Resolution: 1 ppb
Response Time at 25 °C: <20 seconds
Maximum Pressure: 20 bar
Expected cap lifetime: 1 year

TS-407 Medium Range: 0-10 mg/L

Accuracy: 8-10 mg/L: ± 3% MV
Accuracy: 2-8 mg/L: ± 3% MV
Accuracy: 0-2 mg/L: ± 2% MEV
Resolution: 0.001 mb/L
Response Time at 25 °C: <20 seconds
Maximum Pressure: 20 bar
Expected cap lifetime: 2 years

TS-408 High Range: 0-40 mg/L

Accuracy: 0-2 mg/L: ± 3% MEV
Accuracy: 2-8 mg/L: ± 4% MV
Accuracy: 8-10 mg/L: ± 4% MV
Accuracy: 10-40 mg/L: ± 5% MV
Resolution: 0.001 mg/L
Response Time at 25 °C: <20 seconds
Maximum Pressure: 20 bar
Expected cap lifetime: 2 years

- MEV = Measured end value
- MV = Measured value

Dissolved Liquid Cross Sensitivity

While the TecMicro has low cross-sensitivity (is monoscopic) to other gases, dissolved oxygen sensors can be sensitive to the following:

Gaseous sulfur dioxide (SO₂) or chlorine (CL₂)
Alcohols greater than 5%
Hydrogen peroxide (H₂O₂) greater than 3%
Sodium hypochlorite (NaClO, commercial bleach) greater than 3%

If the measurements exhibit instability despite following other troubleshooting procedures, it is possible that interfering substances are present in the solution.

None of the following interfere:

Carbon Dioxide (CO₂)
Hydrogen sulfide (HS-)
pH, or any ionic species like sulfide (S^2-), sulfate (SO₄^-2), chloride (Cl-)
Ammonia (NH₃) pH

Software

The TecMicro features a free software utility that enables users to graph oxygen levels over time, save data, calibrate the sensor, and update the calibration when installing a new sensor cap.