A complete Sechrist 3500CP-G set is more than the mixer unit: manufacturer literature lists the 0–10 LPM flowmeter, the 1000 ml flowmeter and the water trap as standard parts, with air and oxygen hoses as optional items, and a used listing should itemise what actually ships. Buyers should decode part numbers from the unit’s own label and manual, confirm generation compatibility, and treat a missing serial-matched parts list as a risk before payment.
Decoding Sechrist 3500CP-G Part Numbers Before Purchase
The 3500CP-G designation appears on the mixer label and in manufacturer literature; older documents may write it as “3500 CP-G” or “Model 3500CP-G Air/Oxygen Gas Mixer”. The designation identifies a configuration, not just a product family, so the number on the label is the first fact to verify before any parts conversation.
- Model designation: read it directly from the unit’s manufacturer label and compare it with the quotation.
- Standard kit parts documented by the manufacturer for the 3500CP-G: 0–10 LPM flowmeter, 1000 ml flowmeter and water trap assembly.
- Optional parts documented by the manufacturer: air and oxygen hoses, each supplied with Diameter Index Safety System (DISS) fittings.
- Regulatory documentation describes the family as configurable with zero to three flowmeters, so the flowmeter set on a used unit can vary.
- Serviceable components such as inlet filters carry their own part numbers in the service manual; obtain the manual page instead of relying on third-party lists.
Read any claimed part number against the unit’s own documents before accepting it. A seller may quote a filter, flowmeter or hose part number from memory, and the number is only useful when it appears in the manual or on the component itself; when it does not, ask for the source page.
What this can and cannot establish: a legible 3500CP-G label establishes the mixer configuration the manufacturer lists under that designation; it does not establish which accessories will ship, whether the flowmeters are calibrated, or whether internal service parts have been replaced.
Kit-Contents Comparison for Used Sechrist 3500CP-G
Used listings bundle different items under the same model name, so compare kit contents line by line rather than comparing whole-listing prices. The manufacturer-documented starting point for the 3500CP-G is the mixer with two flowmeters and a water trap; anything else should be listed separately by the seller.
Kit contents also vary by route: a refurbished set may include replacement hoses and a fresh water trap, while an as-is listing may ship only the mixer and its original flowmeters. State the route in the comparison so the kit list is judged against the same expectation on every offer.
| Kit component | Role in the set | Manufacturer-documented status | What to check on a used unit |
|---|---|---|---|
| 3500CP-G mixer unit | Proportioning device that blends medical air and oxygen | Core model under the 3500CP-G designation | Label, serial number, housing and bleed-control condition |
| 0–10 LPM flowmeter | Low-flow measurement for neonatal and paediatric delivery | Standard part | Glass condition, scale legibility and calibration sticker |
| 1000 ml flowmeter | Additional low-flow measurement scale on the mixer outlet | Standard part | Presence, condition and whether it matches the listing photo |
| Water trap assembly | Moisture control in the gas path | Standard part | Condition, service life and replacement availability |
| Air and oxygen hoses | Supply connection from wall outlets to the mixer | Optional parts, supplied with DISS fittings | Fitting type, length and condition; confirm compatibility |
| Mounting bracket | Pole or rail mounting for bedside use | Listed per seller | Presence, compatibility with the unit and mounting surface |
| Manual and service records | Evidence for use, calibration and service | Not a hardware part, but part of a complete set | Manual edition matches the unit; records name the serial |
Use the table as the comparison frame when a seller sends a kit list. If a component is missing, ask whether it is excluded by design or simply absent, and get the corrected list in writing before you compare quotes.
Compatibility Boundaries Between Sechrist 3500CP-G Generations
Compatibility cannot be assumed across the 3500 family. Older labels such as “3500”, “3500CP” and the 3500/3500HL series names appear in regulatory and service documentation, and those labels do not by themselves tell a buyer whether the unit is a high-flow or low-flow configuration or which accessories fit.
- DISS fittings are standard on the family’s supply connections; confirm the fitting type on the actual unit before ordering hoses.
- Flowmeter and water-trap compatibility should be confirmed against the unit’s manual and part list, not inferred from the model name.
- If a seller offers parts from an older 3500-series unit, request the part numbers and the manual pages that show interchangeability.
- When the listing cannot show the label or manual, treat generation and compatibility as unverified.
The boundary rule is simple: part compatibility is a document-based decision. If the seller cannot produce the documentation that shows a part fits the 3500CP-G, treat the claim as unconfirmed.
Serial-Tracked Components in Sechrist 3500CP-G Sets
The mixer unit carries the primary serial number, but a complete set may include flowmeters and accessories with their own calibration stickers or identifiers. Build a small register that records the mixer serial and the identifiers of the flowmeters and accessories that ship with it, so the receiving team can confirm that every item matches the file.
- Record the mixer serial from the label photo and match it across quotation, photos and records.
- Ask whether the flowmeters carry separate calibration stickers and request photos of those stickers.
- Confirm the water trap and hoses are new, used or service-exchange items.
- Keep the register with the purchase file for future service and resale.
If the seller cannot identify the flowmeters or accessories that ship with the unit, ask for the identifiers in writing before payment. A set whose components cannot be tracked is harder to service and harder to resell later.
When a Missing Sechrist 3500CP-G Part Should Kill the Deal
Missing parts fall into two groups. Replaceable accessories, such as hoses, a water trap or a mounting bracket, can be priced and added to the order; missing evidence, such as the label photo, serial-matched test records or the manual, cannot be cured by a discount and should stop the deal until it is supplied.
- Missing or illegible model label: stop and request a readable photo before any further discussion.
- Serial mismatch across documents: stop; this indicates the file does not belong to the unit.
- No manual or parts list: stop if the buyer needs service documentation; adjust scope if not.
- Missing water trap, hoses or bracket: not a deal-killer if the seller itemises the omission and adjusts the price.
- Flowmeters missing from a listing described as a complete set: ask for the corrected kit list before payment.
Decide which parts are critical before you negotiate. That keeps the missing-part review objective when the seller offers a lower price instead of the missing item.
Requesting a Written Sechrist 3500CP-G Parts List
Ask the seller for one document that answers the whole kit question, and keep it with the quotation. A written parts list protects both sides and makes receiving inspection straightforward.
- Itemised list of included components with the part numbers shown on the unit or manual.
- Condition statement for each item: new, used, service-exchange or refurbished.
- Serial numbers for the mixer and any serial-tracked flowmeters.
- Confirmation of whether the manual and service records are included.
- Availability and price of spare parts such as inlet filters, water trap elements and flowmeters.
A complete request can be sent as a short list: “Please confirm in writing the exact 3500CP-G kit that will ship, the part numbers on the unit and manual, the serial numbers of the mixer and flowmeters, and the price and availability of inlet filters and water-trap elements.” Written answers become the receiving checklist.
For the sourcing framework this parts guide sits under, the used respiratory equipment buying guide explains how kit and part verification fit into the full purchase process.
Final Check Before Buying Sechrist 3500CP-G Parts or a Full Set
- Label shows 3500CP-G and the serial matches all documents.
- Kit list names each component and its condition.
- Standard parts (0–10 LPM flowmeter, 1000 ml flowmeter, water trap) are confirmed or their omission is explained.
- Optional hoses and mounting bracket are confirmed with fitting type.
- Manual edition and service records are included or confirmed available.
- Spare-part availability and prices are stated in writing.
- Calibration status of the mixer and flowmeters is confirmed.
- Receiving inspection is planned against the written parts list.
For current Sechrist 3500CP-G stock, review the live listings in the HHG medical equipment store and use this checklist when requesting the kit list. For part and configuration questions on a specific unit, contact HHG GROUP LTD through the contact page with the listing details.
Frequently Asked Questions
Can Sechrist 3500 or 3500CP parts be used on a 3500CP-G?
Not without confirmation. Parts from older 3500-series units may fit, but compatibility depends on the specific part, the unit’s generation and the manual, so request the part numbers and the documentation that shows interchangeability before purchase.
What does a complete used Sechrist 3500CP-G set include?
Manufacturer literature lists the mixer with a 0–10 LPM flowmeter, a 1000 ml flowmeter and a water trap as the standard kit, with air and oxygen hoses as optional items. Because used listings vary, ask the seller for an itemised list of what actually ships with the unit.