The Hamilton 281637 flow sensor is a single-use, proximal (Y-piece) differential-pressure flow sensor for adult and pediatric patients on Hamilton Medical ventilators. Each sensor has 1.88 m of twin measurement tubing with 15M × 15F/22M connectors and measures inspiratory and expiratory flow and airway pressure at the patient airway. This listing is for one box of 10 new sensors, part number (REF) 281637.
Why Choose the Hamilton 281637 Proximal Flow Sensor
- Measurement at the patient airway: Proximal placement gives the ventilator accurate volume, flow and pressure data for monitoring and synchronisation.
- Low dead space: Less than 11 ml functional dead space, suited to adult and pediatric tidal volumes.
- Very low resistance: Under 0.03 cmH2O/(l/min) across the full flow range, adding minimal work of breathing.
- Wide flow range: 0 to 180 l/min, with short-term flows up to 260 l/min.
- Single-patient use: Up to 28 days of use per patient (or as your infection-control protocol specifies), which reduces cross-contamination risk and reprocessing workload.
- Latex-, DEHP- and BPA-free: PSU connectors, PVC tubing and a PET flap.
- Box of 10: A practical quantity for ICU, emergency and transport ventilation stock.
Key Features of the Hamilton Adult/Pediatric Flow Sensor
Variable-Orifice Differential-Pressure Design
A thin PET flap inside the sensor housing bends in proportion to gas flow. The pressure difference across the flap goes to the ventilator through the twin tubing and is converted into flow and volume readings.
1.88 m Measurement Tubing
The 188 cm twin tubing runs from the patient Y-piece to the ventilator’s flow sensor ports, leaving room to position the breathing circuit at the bedside or during transport.
Standard 15M × 15F/22M Connectors
Standard conical connectors fit between the breathing circuit Y-piece and the airway interface (ETT connector, HMEF or mask).
Individually Sealed
Each sensor comes in its own sealed pouch with a tubing clip, so it can be stocked and opened as needed.
Hamilton 281637 Flow Sensor Specifications
| Specification | Detail |
|---|---|
| Brand | Hamilton Medical |
| Part Number (REF) | 281637 |
| Product Type | Proximal flow sensor, single-patient use |
| Patient Group | Adult / Pediatric |
| Tubing Length | 1.88 m (188 cm) |
| Connectors | 15M × 15F/22M |
| Flow Range | 0 – 180 l/min (short term 260 l/min) |
| Dead Space | < 11 ml (functional) |
| Resistance | < 0.03 cmH2O/(l/min) over the full flow range |
| Accuracy | ±10% or ±10 ml (C1/T1/MR1/C2/C3/C6); ±20% or ±20 ml (G5/S1), whichever is greater |
| Materials | PSU connectors, PVC tubing, PET flap |
| Latex / DEHP / BPA | Free of natural rubber latex, DEHP and BPA |
| Weight | Approx. 68 g per sensor (with tubing) |
| Operating Temperature | -20 °C to 50 °C |
| Operating Life | Up to 28 days, or per hospital infection-control protocol |
| Quantity | 10 sensors per box |
| Condition | New |
Fits These Hamilton Ventilators
- HAMILTON-C1
- HAMILTON-C2
- HAMILTON-C3
- HAMILTON-C6
- HAMILTON-T1
- HAMILTON-MR1
- HAMILTON-G5
- HAMILTON-S1
Clinical Use Cases
- Intensive care units: Invasive and non-invasive ventilation of adult and pediatric patients.
- Emergency departments: Quick sensor changes between patients on the HAMILTON-C1 and T1.
- Patient transport: Ground and air transport on the HAMILTON-T1.
- MRI suites: Ventilation on the HAMILTON-MR1.
- Stock replenishment: Keeping biomedical and respiratory therapy departments supplied.
How to Use and Replace the Flow Sensor
- Fit the sensor between the breathing circuit Y-piece and the patient airway, with the tubing facing up to keep condensate out.
- Connect the blue and clear tubes to the matching flow sensor ports on the ventilator.
- Run the ventilator’s flow sensor calibration/tightness test after every sensor change.
- Replace after 28 days, when switching patients, or if the sensor is contaminated, damaged or fails calibration.
- Single-patient use only. Do not clean, sterilise or reuse.
Frequently Asked Questions
What is the Hamilton 281637 flow sensor used for?
It measures flow, volume and airway pressure at the patient’s Y-piece for adult and pediatric patients on Hamilton Medical ventilators such as the C1, C2, C3, T1 and G5.
How many flow sensors are in a box?
One box has 10 individually sealed single-use sensors.
Is the 281637 flow sensor reusable?
No. It is single-patient use, for up to 28 days or as your infection-control protocol specifies. Do not reprocess it.
Can the 281637 be used on neonates?
No. The 281637 is for adult and pediatric patients. Neonatal ventilation uses a dedicated neonatal flow sensor with lower dead space.
How long is the flow sensor tubing?
The measurement tubing is 1.88 m (188 cm) long.
Do I need to calibrate the sensor after fitting it?
Yes. Run the ventilator’s flow sensor calibration after connecting a new sensor, and whenever the ventilator prompts you to.
Does the Hamilton 281637 contain latex?
No. It contains no natural rubber latex, DEHP or BPA.
Related Hamilton Ventilator Parts & Accessories
For the rest of your Hamilton setup, see the Hamilton C1/C2/C3 396200/01 oxygen sensor, the Hamilton C1/T1 369108 rechargeable battery and the 369106 replacement battery for Hamilton C2/C3. If you need a different flow sensor, see the 155500 disposable flow sensors (box of 10), or browse all ventilators & parts.
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