Endress+Hauser CPS71E equivalent: Hamilton Polilyte Plus PHI
A Memosens-capable Hamilton counterpart for the CPS71E family with ion trap reference for chemical processes; which variant matches directly and which with notes is stated separately.
Polilyte Plus PHI for the CPS71E
- Counterpart: Hamilton Polilyte Plus PHI (Memosens, Arc, VP, S8). PHI glass provides chemical robustness for autoclave, CIP and SIP.
- Directly matching variants: TB (one ceramic junction, flowable gel) and TU (suitable for upside-down mounting, solidified gel).
- Variants with notes: for TC (three ceramic junctions) and TP (pressurized reference) there is no one-to-one structure in the Hamilton Polilyte Plus family; the related Hamilton alternatives are listed below.
Equivalence level: Equivalent with notes: for TB and TU the reference function is equivalent; pressure and upper temperature values differ, and TC and TP have a structural difference.
Side-by-side technical comparison
| Feature | Endress+Hauser CPS71E | Hamilton Polilyte Plus PHI |
|---|---|---|
| Measuring principle and glass | Glass electrode (pH membrane glass type B) [E1] | Glass electrode; PHI glass (CIP, SIP, autoclave, chemical robustness) [H1] |
| pH range | Application B: pH 0-14; Application H: pH 0-12 [E1] | 0-14 pH [H1] |
| Reference and electrolyte | Ag/AgCl lead with ion trap; 3 M KCl, acrylamide-free flowable gel (TB, TC, TP) or solidified gel (TU) [E1] | Everef-L reference (long diffusion path); Polisolve Plus polymer gel [H1] |
| Junction | Ceramic (zirconium dioxide); choice of 1 or 3 junctions (TC: 3) [E1] | Two Single Pore junctions [H1] |
| Output / protocol | Memosens 2.0 (digital) [E1] | Memosens, Arc (digital); VP, S8 (analog) [H1] |
| Process connection and length | PG 13.5; Ø 11.9 mm; 120 / 225 / 360 / 425 mm [E1] | 12 mm shaft; a-length 120 / 225 / 325 / 425 mm (360 mm only with VP and S8 connectors) [H1] |
| Mounting orientation | TB, TC, TP: upright with at least 15° inclination, upside-down not permitted; TU: any angle, including upside-down [E1] | Upside-down mounting is permitted for Polilyte Plus (VP, MS) [H4] |
| Temperature | 0...140 °C (TP and TU: 140 °C for sterilization only, maximum 100 °C in continuous operation) [E1] | 0...130 °C [H3] |
| Pressure | 0.8-14 bar absolute (Application B; about 13 barg); Application H: 7 bar absolute; TP reference internal pressure 7 bar absolute [E1] | 0-10 barg [H3] |
| Sterilization | TU and TP: 140 °C sterilization; not stated for TB and TC [E1] | PHI: autoclave, CIP and SIP [H1] |
| Certificates / Ex | ATEX II 1G Ex ia IIC T3/T4/T6 Ga; IECEx, NEPSI, CSA C/US and other regional Ex approvals [E1] | Not stated in the catalog for this sensor [H1] |
Every cell carries a source code; the sources are listed below the table. Pressure values: Endress+Hauser states absolute pressure, Hamilton states gauge pressure (barg); the difference is about 1 bar.
Why it is an equivalent
- Both are gel-electrolyte glass pH sensors with a Memosens connector option, aimed at fast-changing pH media in the chemical industry that contain poisons such as H2S.
- E+H cites the ion trap reference and a long poison diffusion path against poisoning; Hamilton Everef-L slows the ingress of poisons into the reference through a long diffusion path. The goal is the same, the mechanism is separate.
- For TB and TU, the ceramic junction (E+H) and Single Pore (Hamilton) are judged equivalent in their documented function; both create stable contact between the sample and the reference.
- The upside-down mounting capability of the TU variant is also stated as permitted in the manufacturer manual for Hamilton Polilyte Plus (VP, Memosens).
Points to check when selecting
- Pressure: the CPS71E is rated 14 bar absolute (about 13 barg), Polilyte Plus PHI 10 barg. This pair does not fit processes above 10 barg.
- Upper temperature: the 140 °C value is for sterilization only for TP and TU; Polilyte Plus PHI is rated 130 °C and suitable for SIP and autoclave. Confirm the continuous process temperature in the manufacturer document.
- TC variant (three ceramic junctions): chosen for difficult flow conditions. On the Hamilton side, MecoTrode H with three HP ceramic junctions is close to this purpose (it reduces flow potential effects); its reference and electrolyte structure differ.
- TP variant (pressurized reference): not available in the Hamilton Polilyte Plus family. Hamilton products with a pressurized reference are EasyFerm Plus and Bio; they are 6 barg with Everef-F reference, and application suitability must be assessed separately.
- Length: the 360 mm length is offered for Polilyte Plus PHI only with VP and S8 connectors; for Memosens choose 120, 225, 325 or 425 mm.
- Transmitter: confirm the Memosens-input transmitter and generation compatibility (Memosens 2.0).
Sources and verification
- [E1] Endress+Hauser Technical Information TI01496C, Memosens CPS71E (TB, TC, TP, TU reference systems; Application B and H).
- [H1] Hamilton Process Analytics Catalog 2026, Polilyte Plus, p.22 (specifications, order codes, glass selection table).
- [H3] Hamilton Process Analytics Catalog 2026, "Sensor Comparison" table, p.184 (Polilyte Plus PHI row).
- [H4] Hamilton pH/ORP operating manual (public/assets/pdf/hamilton/hamilton-ph-orp-traditional-manual.pdf), mounting orientation section.
How the match was verified. The match comes from the Mikron cross-reference study (22-23 September 2026): the reference system, diaphragm and electrolyte functions of both sides were tied to manufacturer quotations, every match was compared element by element and by application area, and the result was re-checked in a separate blind test. Values come from the manufacturer documents listed above; for critical applications please confirm them against the original document and the order code.
Trademark note. Endress+Hauser, Memosens and the other competitor names mentioned are registered trademarks of their respective owners; Hamilton, Polilyte, MecoTrode, OxyFerm, Conducell, Everef, Polisolve, Arc and related names are registered trademarks of their respective owners. The names are used only to describe technical equivalence. Mikron Proses Kimyasal ve Mühendislik Çözümleri A.Ş. is not affiliated with the competitor brands mentioned.
Frequently asked questions
CPS71E counterpart, variant matching and pressure.
What is the Hamilton equivalent of the Endress+Hauser CPS71E?
For Memosens use, Hamilton Polilyte Plus PHI; the TB and TU variants match directly. The TC (three junctions) and TP (pressurized reference) variants have a structural difference; MecoTrode H or the EasyFerm family are the closest alternatives for those variants.
Does Hamilton offer the upside-down mounting of the CPS71E TU?
According to the Hamilton manual, upside-down mounting is permitted only for Polilyte Plus (VP and Memosens) and Polilyte Pro (VP) sensors; it is not permitted for other families. For upside-down mounting, Polilyte Plus is therefore considered.
What information should I share when choosing an equivalent?
The full sensor code (e.g. CPS71E-TB2...), medium, pH range, temperature and pressure (absolute or gauge), mounting orientation, connector, shaft length and transmitter model. With this information we confirm the model and order code together.
Confirm the equivalent for your process
Send your current sensor code, process medium, temperature, pressure and connector; we will confirm the model and configuration together.