Precision Medical Pediatric Flowmeters
Precision Medical · Model Pediatric Flowmeters
Black Glass Float Indicator - enhances visibility in order to assure accurate flow settings. Durable Housing - the polycarbonate housing is strong, durable, and impervious to chemical solutions normally used in a clinical setting. Front Flow Control Knob - in clear sight of the operator and less susceptible to damage during installation of additional equipment. Glass Flowtube - assures consistent readings and allows superb accuracy for precise low-flow requirements. "Stork" Safety Label - the stork label quickly identifies the low-flow flowmeter, preventing accidental use of wrong flowmeter in neonatal application. Shock Protection - the spring above the flowtube and the rubber flow tube bushing absorbs shock to protect the glass tube from breakage.
Key tips
- ·Don't extend filter/tubing replacement intervals to save cost - this is an infection-control issue, not just a performance one.
- ·Flow accuracy drift is often the earliest sign of a failing sensor, well before an outright alarm.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Delivered mix / flow incorrect
HighSymptoms: FiO2 or flow does not match the setting, mix alarm, hypoxic-guard trips.
Root cause: Blender proportioning valve, a supply-pressure imbalance, or a worn flowmeter / needle valve.
Supply-pressure alarm / imbalance
MediumSymptoms: Blender alarm, will not deliver at flow, one gas reads low.
Root cause: Wall / cylinder supply low or one gas missing, or an inlet filter / check-valve fault.
Leak at fittings / bleed noise
MediumSymptoms: Hiss, high gas consumption, will not hold set pressure.
Root cause: Worn O-rings / seals at inlet or outlet fittings, or the blender bleed.
Flowmeter float sticking / inaccurate
LowSymptoms: Float hangs up, flow does not track the knob.
Root cause: Dirty or scratched flow tube, or a worn needle valve.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Proportioning valve / blender core
Class Major service partRel. cost $$$R&R Difficult
Inlet filters / check valves
Class Periodic replacementRel. cost $R&R Fairly easy
Flowmeter (flow tube / needle valve)
Class Major service partRel. cost $$R&R Moderate
O-ring / seal kit
Class Frequent wear itemRel. cost $R&R Fairly easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Proportioning valve / blender core | Major service part | $$$ | Difficult |
| Inlet filters / check valves | Periodic replacement | $ | Fairly easy |
| Flowmeter (flow tube / needle valve) | Major service part | $$ | Moderate |
| O-ring / seal kit | Frequent wear item | $ | Fairly easy |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Filter and tubing replacement
- ·Flow accuracy check
- ·Annual full PM
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Delivered mix / flow incorrect
- Verify the delivered O2 / flow with a calibrated analyser at the outlet.
- Confirm both inlet supply pressures are equal and within spec.
- Check the inlet filters and check valves.
- Calibrate / service the blender per the manual.
- Replace the proportioning valve / flowmeter tube if still out of spec.
Symptom: Supply-pressure alarm / imbalance
- Confirm both gas supplies are connected and at pressure.
- Check the inlet filters for blockage.
- Inspect the inlet check valves.
- Reseat or replace the supply hoses.
- Clear the alarm and re-verify the delivered mix.
Symptom: Leak at fittings / bleed noise / will not hold set pressure
- Locate the hiss with soapy water or an ultrasonic leak detector.
- Replace worn O-rings / seals at the inlet and outlet fittings.
- Check the regulator diaphragm and the blender bleed.
- Re-test for leaks under pressure.
- Re-verify the set pressure / flow.
Symptom: Flowmeter float sticking / flow does not track the knob
- Tap the flow tube to free a stuck float.
- Clean or replace a dirty / scratched flow tube.
- Check the needle valve for wear.
- Verify flow against a calibrated reference.
- Replace the flowmeter assembly if the float still sticks.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Respiratory Therapy department
- Patient floors
- Emergency Department
- Home care (portable units)
Documents & Manuals
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