Model-specific training
Service is performed by engineers who hold manufacturer training, documented service procedures and hands-on competence for the specific blender model. Unfamiliar models are referred — not attempted.
Services · Sechrist, Bird & Maxtec Blender Service
Authorised Sechrist air/oxygen blender service and sales in Australia — plus Bird and Maxtec servicing.
Air/oxygen blenders are primary safety devices in neonatal, respiratory and critical-care environments. Incorrect FiO2 delivery from a faulty or uncalibrated blender represents a direct clinical risk. OHM Healthcare is an authorised Sechrist service centre and supplies new Sechrist air/oxygen blenders in Australia on a reseller basis. We also service, calibrate and repair Bird and Maxtec blenders — delivered by engineers with manufacturer training and documented competence for each supported model.
Bird 3800 Microblender
Authorised Sechrist Service Centre
Sechrist Blender Sales
Maxtec Blender Service
Gas Calibration & Verification
Return-to-Service Documentation
Clinical Context
Why blender accuracy is a patient-safety requirement — not a maintenance preference.
An air/oxygen blender regulates the precise ratio of medical air and oxygen delivered to a patient — directly setting the fraction of inspired oxygen (FiO2). In neonatal intensive care, ECMO and respiratory therapy, a FiO2 deviation of even a few percent can have serious clinical consequences: oxygen toxicity at the high end; hypoxia at the low end.
Blenders are mechanical-pneumatic devices subject to seal degradation, internal gas leaks, valve wear and calibration drift over time. A blender that appears to function normally — passing gas, displaying a reading — may nevertheless be delivering an inaccurate oxygen concentration. Periodic performance verification with calibrated reference analysers is the only way to confirm accuracy throughout service life.
OHM's blender servicing program is structured around this clinical reality. Every service event covers preventive maintenance, gas-ratio calibration, full-range accuracy testing, flow verification, alarm function and documentation — not simply a visual inspection or filter change.
- Seal and O-ring degradation — internal leakage across blending chambers allows uncontrolled gas mixing, causing FiO2 drift that worsens progressively
- Pressure imbalance — changes in wall gas supply pressure can shift delivered FiO2 on blenders that depend on balanced inlet pressure for accuracy
- Valve wear and stiction — control valve degradation produces non-linear response, making set versus delivered FiO2 unpredictable at low or high dial settings
- Blocked inlet filters — particulate accumulation reduces flow capacity and creates inlet pressure differentials that affect mixing ratio
- Calibration drift — even without visible fault, cumulative mechanical tolerances cause delivered FiO2 to deviate from the set value over time
- Alarm system failure — low inlet pressure and crossover alarms may fail silently, removing the safety net that alerts clinicians to gas supply anomalies
Bird Blenders
Bird 3800 Microblender — precision low-flow servicing.
OHM Healthcare holds manufacturer service documentation and direct engineer training for the Bird 3800 Microblender. The 3800 Microblender is designed for low-flow neonatal and paediatric applications where precise FiO2 control at flows below those supported by standard high-flow blenders is clinically essential.
Bird 3800 Microblender
The Bird 3800 Microblender delivers accurate FiO2 control at low patient flows — critical in neonatal ICU where delivered flow rates may be as low as 1–2 L/min. Internal precision orifices and a compensation mechanism maintain accuracy across the FiO2 range independently of small inlet pressure fluctuations.
OHM's service program for the Bird 3800 is built on manufacturer service documentation and trained competence. Service activities follow manufacturer-prescribed procedures and are completed with appropriate test equipment and calibrated reference analysers.
Manufacturer-trained service competence — Bird 3800 Microblender
Service is accepted subject to model confirmation, available parts support and current engineer competence. Contact OHM to confirm service eligibility for your specific Bird blender model and serial number range.
What's included in a Bird blender service
- Full disassembly, inspection and internal clean
- Seal and O-ring replacement per manufacturer PM schedule
- Inlet filter replacement and inlet gas-pressure verification
- Gas-ratio calibration — FiO2 verified at minimum, midpoint and maximum settings using calibrated analyser
- Output flow verification across clinical flow range
- Alarm function test (low inlet pressure, crossover)
- Leak test and pressure integrity check
- Return-to-service documentation with calibration results
Maxtec Blenders
Maxtec blender service — independent servicing, calibration and repair.
OHM Healthcare provides independent service, FiO2 calibration and corrective repair for Maxtec air/oxygen blenders, including the MaxBlend series used in neonatal, paediatric and adult respiratory care across Australian hospitals. Maxtec blender service follows the same model-by-model competence approach OHM applies to every blender it accepts.
Independent Maxtec blender servicing
Maxtec blenders are precision pneumatic proportioning devices. As with any air/oxygen blender, seal wear, inlet-filter loading and control-valve degradation cause delivered FiO2 to drift away from the dial setting without any visible fault. OHM's Maxtec service verifies delivered FiO2 against a calibrated reference-grade oxygen analyser across the dial range and confirms flow capacity, alarm function and pressure integrity before the unit is returned to service.
OHM is an independent service provider for Maxtec blenders. Service is delivered from OHM's Tullamarine (VIC) and Ingleburn (NSW) workshops, with on-site performance verification available by arrangement.
Independent service — Maxtec MaxBlend series air/oxygen blenders
Service is accepted subject to model confirmation, available parts support and current engineer competence. Contact OHM with your Maxtec model and serial number to confirm service eligibility.
What's included in a Maxtec blender service
- Disassembly, inspection and internal clean
- Seal and O-ring replacement per the preventive maintenance schedule
- Inlet filter replacement and inlet gas-pressure verification
- FiO2 verification at minimum, mid-range and maximum settings with a calibrated analyser
- Output flow verification across the clinical flow range
- Alarm function test and bleed-flow check
- Leak test and pressure integrity check
- Return-to-service documentation with calibration results
Sechrist Industries — Authorised Service Provider
Authorised by Sechrist Industries to service respiratory products in Australia.
OHM Healthcare is authorised by Sechrist Industries to provide service and maintenance for Sechrist respiratory products in Australia. This authorisation means OHM works to manufacturer-prescribed service procedures, uses Sechrist-genuine parts, and maintains direct manufacturer technical support for supported Sechrist blender models.
Authorised service provider — OHM holds Sechrist Industries authorisation for service of respiratory products in Australia. Service is performed to manufacturer specifications with genuine parts and documented outcomes.
Supported Sechrist blender models
OHM services the following Sechrist blender models under the authorised service arrangement. Contact OHM to confirm coverage for your specific unit, serial number and requested service scope.
Model 3500CP-G
Sechrist 3500CP-G
High-performance blender for ECMO and cardiac bypass applications. Supports high-flow requirements with precise FiO2 control across the full range.
Model 20400
Sechrist 20400
General-purpose air/oxygen blender for adult and paediatric respiratory therapy. Wall or ceiling-mount configuration for bedside or department use.
Models 20457 / 20459
Sechrist 20457 / 20459
Wall-mount (20457) and pole-mount (20459) blender configurations for flexible installation in ICU, HDU and respiratory ward environments.
Model 3600
Sechrist 3600
High-flow blender for adult ventilation and respiratory therapy environments requiring elevated output flow rates with sustained FiO2 accuracy.
Model 3601
Sechrist 3601
High-flow blender in alternate configuration for demanding respiratory environments. Maintains FiO2 accuracy at elevated flows with dual-inlet gas supply.
Other models
Not listed?
Contact OHM with your Sechrist model and serial number. We will confirm whether service is available within the current authorised scope.
Sechrist blender sales — new units supplied in Australia
Alongside authorised service, OHM Healthcare supplies new Sechrist air/oxygen blenders as a reseller to Australian hospitals, NICUs, ECMO programs and respiratory departments. OHM’s authorisation from Sechrist Industries is a service authorisation — it covers servicing of Sechrist respiratory products in Australia, and new units are supplied on a reseller basis. Buying and servicing through the same engineering team means every unit arrives acceptance-tested, is supported with Sechrist-genuine parts, and enters a documented preventive-maintenance program from day one. Contact OHM to discuss model selection, mounting configuration and current availability.
Service Scope
What OHM's blender servicing covers.
OHM provides a comprehensive air/oxygen blender service program for Sechrist, Bird and Maxtec blenders — from scheduled preventive maintenance through corrective repair and acceptance testing of new or overhauled units. All service events produce traceable documentation and are supported by OHM's wider biomedical engineering services.
Preventive maintenance & calibration
- Scheduled PM per manufacturer-specified interval
- Full disassembly, internal inspection and clean
- Seal, O-ring and diaphragm replacement
- Inlet filter replacement
- Gas-ratio calibration — FiO2 verified at minimum, mid-range and maximum
- Calibration performed with reference-grade O₂ analyser
- Output flow measurement across clinical flow range
- Inlet gas supply pressure verification
- Pressure integrity and leak test
- Alarm function verification — low-inlet, crossover and any model-specific alarms
Corrective service & additional scope
- Fault diagnosis — FiO2 inaccuracy, flow failure, alarm fault, mechanical damage
- Component-level corrective repair to manufacturer specification
- Manufacturer-genuine spare parts for supported models
- Acceptance testing for new or returned-from-repair units
- In-service performance check — on-site verification without full PM
- Pre-handover testing for units entering or leaving service
- Return-to-service documentation with calibration data and test results
- Service history recording and maintenance interval flagging
- Obsolescence assessment for aged or end-of-life units
- Advice on service program structure and PM scheduling for blender fleets
Every blender returned to service by OHM is accompanied by a service report documenting the work performed, calibration results, parts replaced and the name of the engineer who completed the service — not a generic compliance sticker.
Service Approach
Engineer Competence
Test Equipment
Documentation
Sechrist Authorisation
Genuine Parts
Scope Transparency
Competence-led blender service — model by model.
OHM does not offer blender service as a generic medical equipment maintenance activity. Blenders are pneumatic precision instruments where service quality depends directly on engineer competence for the specific model — including knowledge of its internal architecture, calibration procedure, acceptable tolerance ranges and correct parts. We accept blender service requests only where we hold appropriate competence.
Calibrated analysers and tools
Gas-ratio calibration uses calibrated reference-grade O₂ analysers. Flow measurements use calibrated flow meters. Tool calibration records are maintained and available for audit.
Traceable service records
Each service event produces a report documenting work scope, calibration data, parts used, tolerance results and the servicing engineer — structured for maintenance records and future audit.
Authorised by Sechrist Industries
OHM holds Sechrist Industries authorisation for service of respiratory products in Australia. Sechrist service is performed to manufacturer procedures with genuine parts and direct manufacturer technical support.
Manufacturer-sourced parts
For authorised and supported models, OHM uses manufacturer-genuine replacement parts — not generic substitutes. Parts sourcing is confirmed before service is accepted for each model.
We decline unsupported work
If OHM does not hold appropriate competence or parts support for a requested model, we will say so before accepting the job — and where possible, suggest an appropriate alternative path.
Service Capability
OHM blender service — at a glance.
Sechrist Authorised
Authorised by Sechrist Industries for service of respiratory products in Australia — with genuine parts and manufacturer technical support.
Calibrated Equipment
Gas-ratio calibration and flow measurement performed with calibrated reference-grade instruments — not general-purpose test gear.
Traceable Documentation
Every service event is documented — calibration data, parts replaced, tolerances achieved and servicing engineer identity included in the service record.
Australia-Wide Service
Blender service delivered from OHM's Tullamarine (VIC) and Ingleburn (NSW) locations, with field service available by arrangement.
Frequently Asked Questions
Common questions about OHM's blender service.
- How often should an air/oxygen blender be serviced?
Service intervals depend on the manufacturer's recommendations for the specific model, the clinical environment and usage frequency. Most manufacturers specify annual preventive maintenance as a minimum. OHM follows the manufacturer-prescribed interval for each supported model and will advise on appropriate scheduling during the initial service discussion. High-use or critical-application blenders may warrant more frequent performance verification.
- What does "FiO2 calibration" mean in practice?
FiO2 calibration involves setting the blender's control mechanism so that the delivered oxygen concentration matches the dial setting within the manufacturer's specified tolerance — typically ±3% FiO2. OHM's calibration uses a calibrated reference-grade oxygen analyser to measure actual delivered FiO2 at multiple dial positions (minimum, mid-range and maximum). The blender is adjusted until measurements fall within tolerance, and calibration data is recorded in the service report.
- Is OHM authorised to service Sechrist blenders?
Yes. OHM Healthcare is authorised by Sechrist Industries to service respiratory products in Australia. For Sechrist blenders, OHM uses manufacturer service documentation, Sechrist-genuine replacement parts and has access to manufacturer technical support. Supported models include the Sechrist 3500CP-G, 20400, 20457, 20459, 3600 and 3601. Contact OHM to confirm coverage for your specific model and serial number.
- Can OHM service Bird blenders that are not the 3800 Microblender?
OHM's confirmed Bird service competence covers the Bird 3800 Microblender. For other Bird blender models, contact OHM with the model number and serial number. OHM will assess whether current competence, service documentation and parts support are available before accepting service. OHM does not accept Bird blender service for models outside confirmed competence.
- Do you provide on-site blender servicing?
Blender servicing is typically performed at OHM's workshop where controlled conditions, calibrated test equipment and the complete parts inventory are available. On-site performance checks and in-service verification visits can be arranged by agreement. Contact OHM to discuss your location and service requirements — logistics can often be structured to minimise equipment downtime.
- What documentation do we receive after service?
Each service event produces a written service report including:
- Unit identification (model, serial number, asset ID)
- Service scope performed
- Parts replaced (manufacturer part numbers)
- FiO2 calibration results (pre- and post-calibration measurements)
- Flow test results
- Alarm function test outcomes
- Pass/fail determination and return-to-service status
- Servicing engineer name and date
Documentation is formatted to support maintenance record-keeping and biomedical program audit.
- Does OHM sell new Sechrist blenders in Australia?
Yes. OHM Healthcare supplies new Sechrist air/oxygen blenders to Australian hospitals and health services on a reseller basis, and as an authorised Sechrist service centre can support each unit through acceptance testing, preventive maintenance and repair for its full service life. Contact OHM to discuss model selection, mounting configuration and current availability, or request a quote.
- Can OHM service Maxtec blenders?
Yes. OHM provides independent service, FiO2 calibration and repair for Maxtec air/oxygen blenders, including the MaxBlend series. Maxtec service is delivered to the same standard as OHM's other blender work — calibrated reference-grade oxygen analysers, flow and alarm verification, and a written return-to-service report. Contact OHM with the model and serial number to confirm service eligibility for your specific unit.
- Can you advise on blender replacement if a unit is beyond economical repair?
Yes. Where a blender is determined to be beyond economical repair — due to parts obsolescence, irreparable internal damage or cost of repair exceeding replacement value — OHM will advise accordingly in the service report. OHM can also assist with identifying replacement options and, for Sechrist units, discuss current model availability.
Request blender service or discuss a PM program.
Contact OHM Healthcare's clinical engineering team with your blender model, serial number and service requirement. We confirm service eligibility and availability before proceeding — and respond within one business day.
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