OPSIS O2000 Oxygen Monitor – Zirconia O2 Analyser Control Unit

Product Information

Manufacturer	OPSIS AB (Sweden)
Model	O2000
Product Type	In-situ zirconia (ZrO2) oxygen monitor / O2 analyser – control unit with display
Nameplate marking	OPSIS O2000 - 3839 (3839 appears to be the serial / unit number – Not verified)
Power rating	Not clearly visible in the supplied photograph (datasheet: 100–240 VAC, 50–60 Hz)
Marking	CE, WEEE symbol
Front panel	LCD display, 4 keys (↓, ↑, SET, ESC), printed operating instructions for O2 calibration and status
Alarm indication module (inside panel)	OPSIS module with LEDs: Power ON, Heater failure, Cell failure, Cell not heated
Other parts visible	Omron plug-in relays (3 pcs), DIN-rail terminals, Unitronic LiYY signal cable
Last verification label	Service/verification sticker dated 2023
Country of manufacture	Not clearly visible in the supplied photograph
Condition	Refurbished
Supplier	SM MARINE SERVICE™, Chattogram, Bangladesh

Product Introduction

The OPSIS O2000 is an in-situ oxygen monitor that measures the O2 content of flue gas directly in the stack or duct with a heated zirconia probe. It is used for combustion control, boiler optimisation and continuous emissions monitoring (CEM) in power plants, industrial boilers, incinerators and process plants, and can also be applied on boiler and exhaust gas installations. SM MARINE SERVICE™ supplies OPSIS O2000 control units, probes and related spare parts to customers worldwide. Visit https://www.smmarineservice.com/ for more automation and control equipment.

What Is This Equipment?

The O2000 system has two main parts: a probe inserted into the flue gas, which is heated and supplied with ambient air as an oxygen reference, and a control unit that processes the sensor signal, shows the oxygen value, gives the 4–20 mA output and alarms, runs self-checks and handles calibration. The zirconia (ZrO2) cell produces a signal proportional to the difference in oxygen concentration between the flue gas and the reference air. Because the measurement is in-situ, no gas extraction or sample conditioning system is needed.

Main Features

• In-situ zirconia measurement – no sample extraction, low risk of clogging
• Measuring range 0.1–25.0% O2, response time below 5 seconds
• 2 × 20 character backlit LCD and 4 keys (↓ ↑ SET ESC) for operation and calibration
• Manual and configurable automatic calibration (zero and span) via a separate calibration gas channel
• Built-in reference air pump and easy-access filters
• Continuous self-checks and diagnostics of probe and heater
• Isolated 4–20 mA output and relay contacts; optional high/low O2 alarm
• Possibility to connect two O2 probes to one analyser
• Rugged IP65 enclosure
• EN 15267 certified, tested by German TÜV and British MCERTS

OPSIS O2000 oxygen monitor – front panel with display, keypad and operating instructions

Main Technical Specifications

Manufacturer data for the OPSIS O2000. Values for the pictured unit should be confirmed on the nameplate.

Measuring principle	In-situ zirconia (ZrO2) sensor
Measuring range	0.1–25.0% O2
Accuracy	±0.01% at 2% O2; ±0.1% at 10% O2 and above
Linearity	< 0.5% FS
Lag / response time	< 2 s / < 5 s
Warm-up time	< 30 min
Zero / span drift	±2% of range per month
Max. stack gas temperature	500 °C (high-temperature kit up to 1800 °C)
Probe	AISI 316, 3" pipe thread, insert length 200–500 mm (up to 1500 mm EPL), approx. 4 kg
Power supply	100–240 VAC, 50–60 Hz; <100 VA warm-up, <50 VA running
Analogue output	4–20 mA isolated, max. 500 Ω
Relay contacts	Max. 220 VAC, 5 A
Ambient conditions	0–50 °C, max. 90% RH
Enclosure	IP65
Analyser dimensions	400 × 300 × 210 mm (older) / 300 × 380 × 210 mm (newer)
Analyser weight	Approx. 10 kg

Inside the Unit: PCBs, Modules & Part Numbers

OPSIS does not publish separate PCB part numbers for the O2000. The modules below are known from the manufacturer datasheet or are visible in the supplied photographs. Please send the board label photo for exact identification.

O2000 Control Unit / Main Electronics Board

Embedded microcontroller that processes the zirconia cell signal, controls the probe heater, drives the display and keypad, and gives the 4–20 mA output and relays. PCB part number: Not verified.

LCD Display & Keypad

2 × 20 character backlit LCD with 4 touch keys (↓ ↑ SET ESC). Part number: Not verified.

Probe Failure Alarm Module (Alarm Kit 502)

The datasheet lists an optional Alarm Kit 502 for probe failure. The pictured DIN-rail OPSIS module shows Power ON, Heater failure, Cell failure and Cell not heated LEDs; that it is the Alarm Kit 502 is Not verified.

Zirconia Sensor Cell & Probe Heater

Heated ZrO2 measuring cell inside the probe. Part number: Not verified.

Reference Air Pump & Filters

Built-in pump supplying reference air to the probe, with easy-access filters.

Stack Unit Signal Amplifier (option)

Used when the probe cable is longer than 10 m.

Output Relays

Omron plug-in relays (3 pcs) visible in the panel for alarm/status signals. Exact relay type: Not clearly visible in the supplied photograph.

Main Components & Related Units

• OPSIS O2000 analyser / control unit
• O2000 zirconia probe (standard 200–500 mm, EPL extended up to 1500 mm)
• High-temperature kit (up to 1800 °C) and probe for corrosive environments
• Junction box for electrical connections
• Stack unit signal amplifier (option)
• Automatic gas calibration set (option)
• Flame arrester (option)
• Alarm Kit 502 for probe failure (option)

Marine & Industrial Applications

• Boiler combustion control and O2 trim
• Continuous emissions monitoring (CEM) in power plants and incinerators
• Industrial furnaces and process plants
• Flue gas oxygen measurement on boiler and exhaust gas installations
• Stand-alone O2 measurement or together with OPSIS emission monitoring systems

OPSIS O2000 nameplate and panel with alarm indication module and Omron relays

Common Problems & Troubleshooting

• Heater failure / Cell not heated: check probe heater supply, probe cable and connections; a defective heater or cable is a common cause.
• Cell failure: the zirconia cell may be aged or damaged; check the cell signal and perform a calibration.
• Wrong or drifting O2 reading: check reference air supply, pump and filters, air leaks at the probe flange, then calibrate zero and span with certified gas.
• No 4–20 mA signal: check output wiring, load resistance (max. 500 Ω) and control unit settings.
• Blank display: check power supply and fuses.

Safety note: The probe operates hot and is mounted in flue gas ducts. Isolate power, let the probe cool down and follow plant permit-to-work procedures before removing it. Electrical work should be done by qualified personnel only.

Common Alarms

The alarm module in the photographs indicates: Power ON, Heater failure, Cell failure and Cell not heated. The O2000 front panel also offers SHOW ACTIVE ALARMS, SHOW CHECK ALARMS and CLEAR ALARMS functions, and an O2 MAX ALARM setting.

Maintenance Tips

• Clean or replace the reference air filters regularly.
• Calibrate zero and span with certified calibration gas at regular intervals.
• Inspect the probe for dust build-up and corrosion during shutdowns.
• Check cable glands and terminals for tightness and moisture.

Spare Parts & Replacement Availability

For a quotation, please send the nameplate photo (model and number, e.g. O2000 - xxxx), probe length, power supply and a photo of any faulty board. SM MARINE SERVICE™ ships worldwide from Bangladesh and China. Specific condition and availability are subject to confirmation.

Why This Equipment Is Still Used

The O2000 is a simple and robust in-situ analyser with low maintenance needs. Many installations keep the existing probe, mounting and wiring, so a tested replacement control unit or spare part is the fastest way to get the measurement running again.

FAQ

What is the OPSIS O2000?
An in-situ zirconia oxygen monitor for flue gas O2 measurement.

What is the measuring range?
0.1–25.0% O2.

What does "O2000 - 3839" on the label mean?
O2000 is the model; 3839 appears to be the unit/serial number (Not verified).

What does "Heater failure" mean?
The probe heater is not working correctly; check heater, cable and supply.

What does "Cell not heated" mean?
The zirconia cell has not reached operating temperature, e.g. during warm-up or due to a heater fault.

What is the Alarm Kit 502?
An optional OPSIS kit for probe failure alarm.

Are PCB part numbers available for the O2000?
OPSIS does not publish them; send us the board label photo and we will identify it.

What output does the O2000 give?
Isolated 4–20 mA plus relay contacts.

How is it calibrated?
With zero and span gas via the calibration gas fitting, manually from the keypad or automatically.

Can you supply a replacement O2000?
Yes, send the nameplate photo for a quotation.

Short Product Description

The OPSIS O2000 is an in-situ zirconia oxygen monitor for continuous O2 measurement in flue gas. A heated ZrO2 probe measures directly in the stack, while the control unit with LCD display and four keys handles signal processing, calibration, self-checks, 4–20 mA output and alarms. It covers 0.1–25% O2 with fast response and is used for boiler combustion control, emission monitoring and process control. Probe failure alarms such as heater failure and cell failure help quick troubleshooting. SM MARINE SERVICE™ supplies refurbished OPSIS O2000 units and spare parts worldwide, subject to confirmation of condition and availability.

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SM MARINE SERVICE™ – Marine Automation & Navigation Equipment Supplier
Available Equipment Conditions: New • Used • Refurbished • Reconditioned (Specific product condition and availability are subject to confirmation.)
Stock Locations: Bangladesh • China
Services: Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: https://www.smmarineservice.com/

Contact us today with your nameplate photo for a fast quotation on OPSIS O2000 oxygen analysers and spare parts.

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