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Rosemount
Rosemount 5081 Two-Wire Transmitter
Quote on request
No online payment · add lines to RFQ BOM
2-wire XP; pH/cond/DO/Cl2 boards; HART/FF; ±0.05 mA out. RFQ + selection help.
Download datasheet PDF
RFQ cart holds BOM lines only. Submit for engineering quote.
Key parameters
Measuring range
Two-wire transmitter for pH/ORP, contacting/toroidal conductivity/resistivity, dissolved oxygen (ppm/ppb), ozone, free/total chlorine (measurement boards 5081-P/C/T/A)
Accuracy
Output accuracy ±0.05 mA; sensor/input accuracy depends on measurement board (e.g. amperometric input linearity ±0.3 % of range)
Output
4–20 mA with HART; or FOUNDATION Fieldbus (-FF/-FI)
Supply
Min 12 Vdc at terminals; max 42.4 Vdc (30 Vdc IS); HART load ≥250 Ω
Electrical connection
¾-in. NPT conduit openings
Housing
Cast aluminum Type 4X (IP65) enclosure, neoprene O-ring cover seals
Fits loop-powered analytical transmit in XP housings where you need a Rosemount 5081 with measurement boards for pH/ORP, conductivity, DO, ozone or chlorine, 4–20 mA HART or FOUNDATION Fieldbus, and ±0.05 mA output accuracy.
Key advantages
- Boards — 5081-P/C/T/A for pH/ORP, conductivity/resistivity, DO, ozone, chlorine
- Output — 4–20 mA HART; or FOUNDATION Fieldbus (-FF/-FI)
- Output accuracy — ±0.05 mA
- Power — Min 12 Vdc at terminals; max 42.4 Vdc (30 Vdc IS); HART load ≥250 Ω
- Housing — Cast aluminum Type 4X (IP65) explosion-proof class
Typical applications
- XP two-wire pH/DO loops.
- HART analytical points in hazardous areas.
- FF liquid-analysis segments.
Selection guide
- Board code — P/C/T/A
- Protocol — HART vs FF
- IS vs XP — Approval path
- Loop voltage — 12 V min at terminals
Common mistakes
- Insufficient loop voltage at transmitter.
- Wrong board for sensor.
- HART without 250 Ω load.
When to RFQ / what to tell us
- Board, protocol, approvals.
- Quantity and ship-to.
Request a Quote · Get selection help
Specs
| Spec | Value |
|---|---|
| SKU | 30799 |
| Brand | Rosemount / Emerson |
| Model | 5081 |
| Product type | Liquid Analysis Transmitter |
| Measuring range | Two-wire transmitter for pH/ORP, contacting/toroidal conductivity/resistivity, dissolved oxygen (ppm/ppb), ozone, free/total chlorine (measurement boards 5081-P/C/T/A) |
| Accuracy | Output accuracy ±0.05 mA; sensor/input accuracy depends on measurement board (e.g. amperometric input linearity ±0.3 % of range) |
| Output signal | 4–20 mA with HART; or FOUNDATION Fieldbus (-FF/-FI) |
| Supply voltage | Min 12 Vdc at terminals; max 42.4 Vdc (30 Vdc IS); HART load ≥250 Ω |
| Housing material | Cast aluminum Type 4X (IP65) enclosure, neoprene O-ring cover seals |
Documents
FAQ
Q: Output accuracy? A: ±0.05 mA.
Q: Min voltage? A: 12 Vdc at terminals (class).
Q: What should I send for a quote? A: Board/protocol/approvals, quantity, ship-to.
Links
| Parameter | Value |
|---|---|
| Measuring range | Two-wire transmitter for pH/ORP, contacting/toroidal conductivity/resistivity, dissolved oxygen (ppm/ppb), ozone, free/total chlorine (measurement boards 5081-P/C/T/A) |
| Accuracy | Output accuracy ±0.05 mA; sensor/input accuracy depends on measurement board (e.g. amperometric input linearity ±0.3 % of range) |
| Output | 4–20 mA with HART; or FOUNDATION Fieldbus (-FF/-FI) |
| Supply | Min 12 Vdc at terminals; max 42.4 Vdc (30 Vdc IS); HART load ≥250 Ω |
| Electrical connection | ¾-in. NPT conduit openings |
| Housing | Cast aluminum Type 4X (IP65) enclosure, neoprene O-ring cover seals |
| Protection | Type 4X (IP65) |
| Ambient temperature | −20 to 65 °C (−4 to 149 °F); storage −30 to 80 °C |
| Display | Two-line LCD; PV 0.8 in (20 mm); secondary 0.3 in (7 mm) |
| Communication | HART; FOUNDATION Fieldbus; infrared remote controller |
| Approvals | CSA IS/NI/XP; FM; ATEX IS; CE |
| Hazardous area | IS Class I Div 1 / XP options; Div 2 suitable listings per PDS |
| Notes | Transmitter-only — process_connection/wetted blank. Specs from PDS 00813-0100-3581 Rev T March 2025. |
| Weight | 10 lb / shipping 11 lb (4.5 / 5.0 kg) |