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Endress+Hauser
Endress+Hauser Memosens COS51E Digital Oxygen Sensor
Quote on request
No online payment · add lines to RFQ BOM
Memosens amperometric DO; 0–100 mg/l; Ex options. RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
0 to 100 mg/l; 0 to 2000 hPa; 0.00 to 1000 %SAT
Accuracy
≤ ±1% of measured value (TN and TF membrane caps; IEC 60746-1)
Output
Digital Memosens 2.0 inductive (via CYK10 to Liquiline transmitters)
Wetted parts
Shaft POM; membrane cap POM; Au working electrode; Ag/Ag-halide counter/reference; ETFE/FEP membrane
Protection
IP68 (2 m water column, 21 °C, 24 h)
Approvals
ATEX; IECEx; CSA C/US; NEPSI; Japan Ex; INMETRO; Class I Div 1/2 (CSA)
Fits dissolved oxygen measurement where you need a Memosens COS51E amperometric digital sensor with 0–100 mg/l range and Liquiline integration.
Key advantages
- Range — 0 to 100 mg/l; 0 to 2000 hPa; 0.00 to 1000 %SAT
- Accuracy — ≤ ±1% of measured value (TN/TF membrane caps; IEC 60746-1)
- Digital — Memosens 2.0 inductive via CYK10 to Liquiline
- Response — TN t90 3 min / t98 8 min; TF t90 30 s / t98 90 s @ 20 °C
- Process — −5 to 60 °C; max 5 bar abs; IP68
Typical applications
- Wastewater aeration DO control.
- Process water oxygen monitoring on Liquiline panels.
- Ex-rated DO points with listed approvals.
Selection guide
- Membrane — TN standard vs TF fast response
- Transmitter / cable — Liquiline + CYK10 length
- Approvals — ATEX/IECEx/CSA etc. as required
- Process — Stay within 5 bar abs and −5…60 °C
Common mistakes
- Expecting optical LDO behavior — COS51E is amperometric with electrolyte/membrane care.
- Ordering TN when the loop needs TF fast response.
- Omitting Ex certificate when the install is classified.
When to RFQ / what to tell us
- DO span, membrane (TN/TF), Ex need.
- Transmitter/cable; process T/P.
- Quantity and ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 141139 |
| Brand | Endress+Hauser |
| Model | E+H Memosens COS51E Digital Oxygen Sensor |
| Product type | Dissolved Oxygen Sensor |
| Measuring range | 0 to 100 mg/l; 0 to 2000 hPa; 0.00 to 1000 %SAT |
| Accuracy | ≤ ±1% of measured value (TN and TF membrane caps; IEC 60746-1) |
| Output | Digital Memosens 2.0 inductive (via CYK10 to Liquiline transmitters) |
| Sensor type | Amperometric potentiostatic 3-electrode DO sensor; alkaline saline electrolyte |
| Process temperature | −5 to 60 °C (20 to 140 °F) |
| Process pressure | Max. 5 bar abs (72.5 psi abs) |
| IP rating | IP68 (2 m water column, 21 °C, 24 h) |
| Response time | TN (standard): t90 3 min / t98 8 min; TF (fast): t90 30 s / t98 90 s @ 20 °C |
| Wetted materials | Shaft POM; membrane cap POM; Au working electrode; Ag/Ag-halide counter/reference; ETFE/FEP membrane |
Documents
FAQ
Q: Optical or amperometric? A: Amperometric potentiostatic 3-electrode DO with alkaline saline electrolyte.
Q: What is the measuring range? A: 0 to 100 mg/l (also hPa and %SAT scales).
Q: What should I send for a quote? A: Span/membrane/Ex, transmitter, T/P, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | 0 to 100 mg/l; 0 to 2000 hPa; 0.00 to 1000 %SAT |
| Accuracy | ≤ ±1% of measured value (TN and TF membrane caps; IEC 60746-1) |
| Output | Digital Memosens 2.0 inductive (via CYK10 to Liquiline transmitters) |
| Wetted parts | Shaft POM; membrane cap POM; Au working electrode; Ag/Ag-halide counter/reference; ETFE/FEP membrane |
| Protection | IP68 (2 m water column, 21 °C, 24 h) |
| Approvals | ATEX; IECEx; CSA C/US; NEPSI; Japan Ex; INMETRO; Class I Div 1/2 (CSA) |
| Sensor type | Amperometric potentiostatic 3-electrode DO sensor; alkaline saline electrolyte |
| Notes | Specs from Endress+Hauser TI01620CEN (Memosens COS51E) + product page. |
| Process Temperature | −5 to 60 °C (20 to 140 °F) |
| Process Pressure | Max. 5 bar abs (72.5 psi abs) |
| Response Time | TN (standard): t90 3 min / t98 8 min; TF (fast): t90 30 s / t98 90 s @ 20 °C |