For a NICU blender purchase, the name on the label is a starting point, not a specification. Sechrist’s 3500 family includes older 3500 and 3500CP labels plus the current 3500CP-G low-flow mixer, and two units with the same family name can differ in flow rating, flowmeter configuration and accessories. Buyers should compare documented specifications, kit contents and service history, and confirm each difference against the unit’s label and manual before selecting.
Sechrist 3500CP-G vs 3500CP vs 3500: What Each Configuration Includes
The safest way to read this family is by configuration, not by model name. Current manufacturer literature lists the 3500CP-G as a low-flow gas mixer with a standard kit of two flowmeters and a water trap, while the older “3500” and “3500CP” labels appear across regulatory and service records for the 3500/3500HL series without a single published specification that applies to every unit.
| Label on the unit | Documented position | Specification on record | What to verify before purchase |
|---|---|---|---|
| 3500CP-G | Current manufacturer designation for the low-flow mixer configuration | ±3% accuracy; 40 LPM maximum flow at 60% oxygen and 50 psig; 21–100% range; DISS connections; standard kit with two flowmeters and water trap | Serial-matched test records, calibration, kit contents and bleed-control condition |
| 3500CP | Older label variant within the 3500/3500HL family | No single published specification covering all units; flow rating varies by configuration | Full label, matching manual, service records and accessory compatibility |
| 3500 / 3500HL | Earlier series names covering low-flow and high-flow versions | Configuration-specific; older clinical and regulatory records reference both flow classes | Flow rating from label and manual; fitting and flowmeter configuration |
- 3500CP-G: the designation used in current manufacturer literature for the low-flow mixer configuration.
- 3500CP: an older label variant that needs confirmation; it may appear on units and service records from earlier periods of the family.
- 3500 and 3500HL: earlier series names that cover both low-flow and high-flow mixer versions in regulatory history.
If a listing says only “Sechrist 3500” or “Sechrist 3500CP”, ask for the full label and the manual title before comparing it with a 3500CP-G. Without those two documents, the seller’s description is an interpretation, not a specification.
Specifications That Matter: Sechrist 3500CP-G vs 3500CP vs 3500
Compare specifications on the unit’s own documents rather than on family averages. For the 3500CP-G, manufacturer and regulatory sources consistently describe a low-flow proportioning mixer with accuracy of ±3 percent, a maximum flow of 40 LPM at 60 percent oxygen and 50 psig, an oxygen concentration range from 21 to 100 percent, DISS supply connections and two mixed-gas outlets.
- Flow rating: read the maximum flow at a stated oxygen percentage and supply pressure; “3500” labels alone do not prove low-flow or high-flow capability.
- Accuracy: confirm the stated accuracy and the condition it applies to, usually full scale at a defined flow.
- Supply pressure: the HHG product listing states 30–75 psig for the 3500CP-G, while earlier regulatory documents state 30–70 psi with the two supply pressures within 20 psi of each other; confirm the applicable figure in the unit’s manual.
- Fittings and outlets: DISS inlet connections and the number of mixed-gas outlets should be confirmed on the unit.
- Flowmeter configuration: regulatory documentation describes zero to three flowmeters, so count and condition them on the actual set.
What a specification table can and cannot establish: a dated specification sheet establishes the rated values for the configuration it describes; it cannot establish that the used unit in front of you meets those values, which requires a serial-matched test record.
Accessory and Consumable Ecosystems: Sechrist 3500CP-G vs 3500CP vs 3500
The accessories determine whether a unit can go into service as delivered. A low-flow blender configuration without its matching flowmeter set, water trap and supply hoses is incomplete regardless of the mixer’s condition, so compare the accessory ecosystem as part of the model decision.
- Confirm which flowmeters the unit needs and whether the listing includes them.
- Check the water trap and inlet filter position in the service schedule and their replacement availability.
- Confirm DISS hose compatibility and the hose lengths required for your bedside layout.
- Ask the seller which consumables are shared with older 3500-series units and which are specific to the newer configuration.
Accessory prices vary by seller, condition and flowmeter type; request a dated itemised quote and treat undated accessory prices as unverified.
The ecosystem comparison should also ask which consumables are shared with the facility’s existing 3500-family units. If the department already stocks water-trap elements and DISS hoses for one configuration, a model that uses the same consumables lowers the running cost, while a configuration with unique consumables adds a new stock line.
Verified Stock and Refurbished Availability: Sechrist 3500CP-G vs 3500CP vs 3500
Used stock of all three labels appears in the market, but verified availability is not the same as listed availability. A verified refurbished 3500CP-G carries serial-matched calibration and test records; an older 3500 or 3500CP unit may be equally serviceable but only when its own records support the configuration claimed.
- Ask the seller to state the exact label, not the family name.
- Request the service history that shows what was tested, calibrated and replaced.
- Confirm that the records name the unit’s serial number.
- For current 3500CP-G stock, review the live Sechrist 3500CP-G oxygen blender listing as the comparison example for a documented unit.
Total-Cost View of Sechrist 3500CP-G and 3500CP vs 3500
Model choice changes the five-year cost through calibration, spares availability, retrofit needs and service intervals, not only through the purchase line. A newer 3500CP-G configuration usually has clearer manufacturer documentation and parts support; an older 3500-series unit may cost less to acquire but can carry higher verification and retrofit cost when the label, manual and spares are harder to source.
- Include calibration and full-service cost in the model comparison.
- Check the availability and price of service parts before selecting an older configuration.
- Compare the accessory sets each listing includes, not only the mixer price.
- Keep the purchase, calibration, service and residual values in one cost file so the model decision is auditable.
For the full three-to-five-year cost framework, use a dedicated total-cost-of-ownership method rather than treating the model comparison as a cost study; this page focuses on which configuration fits the department.
Which Buyer Should Choose Sechrist 3500CP-G Over 3500CP vs 3500
Choose the 3500CP-G when the department needs a documented low-flow configuration for NICU and paediatric blending, because current manufacturer literature, standard kit contents and calibration paths are easier to verify. Consider an older 3500 or 3500CP label only when the seller provides a complete file: a readable label, the matching manual, serial-tracked test records and confirmed accessory compatibility.
- If the need is low-flow blending with full documentation: choose 3500CP-G with records.
- If an older labelled unit is significantly cheaper but the file is incomplete: treat the missing file as verification cost, not savings.
- If the application needs higher flows than a low-flow mixer provides: look for the high-flow configuration in the 3500 family and confirm the flow rating on the label.
- If the listing cannot show the label or manual: pass, regardless of the model name.
Decision Table: Sechrist 3500CP-G vs 3500CP vs 3500 for Your Department
| Your situation | Stronger fit | Why | Before you buy |
|---|---|---|---|
| NICU/PICU low-flow blending with a documented, current configuration | 3500CP-G with serial-matched records | Current manufacturer literature and standard kit contents are verifiable | Confirm calibration, flowmeter set and accessory list |
| Budget-led purchase where an older 3500 or 3500CP unit is offered | Older label only with a complete file | Older labels do not by themselves prove flow rating or configuration | Label photo, manual edition, serial-matched test records |
| Department needs flows above the low-flow mixer rating | High-flow configuration in the 3500 family | Flow capability is configuration-specific, not family-wide | Confirm the maximum flow on the label and in the manual |
| Sight-unseen purchase without label or manual evidence | Neither model | No document-based way to confirm the configuration | Request documents first or pass on the deal |
Use the decision table after the documents arrive, not before. When the label, manual and records agree, the table converts the evidence into a selection; when they do not, no table row can substitute for the missing file. For the wider sourcing and verification framework for this equipment family, see the used respiratory equipment buying guide.
For current stock and configuration questions, contact HHG GROUP LTD through the contact page with the label details of the unit you are comparing, so the enquiry can be matched to the correct configuration and records.
Frequently Asked Questions
Is the Sechrist 3500CP-G still in production?
Current manufacturer literature lists the 3500CP-G as an active mixer model, but production and distribution status can change by market. Confirm current availability of new units and service parts with the manufacturer or an authorised distributor before planning a purchase.
How much do Sechrist 3500CP-G accessories cost?
Flowmeter, hose and mounting-bracket prices vary by seller, condition and configuration, and no approved accessory price list is quoted in this guide. Request a dated itemised quotation and compare accessories on the same basis as the mixer.