Keller LEX1 digital precision pressure gauge, 0.05% FS total error band (to 0.01% FS), RS485, −1…1 to 0…1,000 bar
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Quick overview
- Type: Pressure gauges & indicators
- Signal / Protocol: RS-485
- Hazardous area: Hazardous-area rated / option
- Genuine productsSourced from the manufacturer or authorised channels
- Delivery across BangladeshDhaka, Chattogram and all industrial zones
- After-sales supportInstallation guidance and warranty handling
- Reply within 24 hoursCall +880 1713 552466 or email hello@argonmark.com
Specifications
| General | |
|---|---|
| Part no. | BD-1527 |
| Category | Oil & Gas Instruments |
| Group | Instrumentation & Control |
| Brand | Keller |
| Model | LEX1 / LEX1-Ei |
| Technical | |
| Type | Pressure gauges & indicators |
| Signal / Protocol | RS-485 |
| Hazardous area | Hazardous-area rated / option |
Datasheet
Technical features
| Reference-class digital gauge | ±0.05% FS including temperature effects from 0 to 50 °C |
|---|---|
| Optional increased precision ±0.025% or ±0.01% FS (absolute ranges ≥ 10 bar), with DAkkS certificate on request | |
| Encapsulated piezoresistive sensor; digital zero and span calibration | |
| RS485 bus for up to 128 devices; free Keller software | |
| Min/max display; 12 units plus 5 user-defined | |
Applications
| Calibration reference for pressure gauges and transmitters | |
| Laboratory pressure measurement | |
| Industrial precision testing |
Key specifications
| Ranges | −1…1 bar to 0…1,000 bar (relative or absolute) |
|---|---|
| Accuracy | ±0.05% FS total error band (0–50 °C); precision to ±0.01% FS optional |
| Resolution | Down to 0.0001 bar |
| Interface | RS485 (up to 128 devices), 15 readings/s |
| Power | 3 V CR2430 (≈ 2,000 h) or 8–28 V DC |
| Approvals | LEX1-Ei intrinsically safe option; IP65 |
Specification
| Accuracy at 20–25 °C | ≤ ±0.05% FS |
|---|---|
| Total error band (0–50 °C) | ≤ ±0.05% FS |
| Long-term stability | ≤ ±0.1% FS per year (> 1 bar); ≤ ±1 mbar (≤ 1 bar) |
| Range reserve | ±10% |
| Temperature reading | ±1 °C typ. |
| Battery | 3 V CR2430, ≈ 2,000 h continuous |
| External supply | 8–28 V DC (not for Ei); ±32 V protected |
| Interface | RS485 half-duplex, 15/s; Fischer connector |
| Display | 2 rows × 5 digits; pressure + min/max; bar, mbar, hPa, kPa, MPa, psi, mH2O, cmH2O, inH2O, ftH2O, mmHg, inHg, kp/cm² |
| Wetted materials | 316L stainless steel |
| Connection | G¼ (others optional) |
| Protection | IP65 |
| Weight | ≈ 300 g |
Ranges
| Relative (bar) | Absolute (bar abs.) | Proof (bar) | Resolution (bar) |
|---|---|---|---|
| −1…1 | 0…2 | 8 | 0.0001 |
| −1…3 | 0…4 | 8 | 0.0001 |
| −1…6 | 0…7 | 20 | 0.0001 |
| −1…10 | 0…11 | 30 | 0.0001 |
| −1…16 | 0…17 | 90 | 0.001 |
| −1…30 | 0…31 | 90 | 0.001 |
| – | 0…61 | 300 | 0.002 |
| – | 0…101 | 300 | 0.002 |
| – | 0…161 | 600 | 0.01 |
| – | 0…300 | 600 | 0.01 |
| – | 0…400 | 800 | 0.02 |
| – | 0…700 | 1,100 | 0.05 |
| – | 0…1,000 | 1,100 | 0.1 |
Notes
| Data from the manufacturer's published datasheet. Confirm model, range, materials and approvals with Argonmark before ordering. |
Photo: courtesy of Keller, used with permission (source) — background removed by Argonmark. All photo credits
Description
The Keller LEX1 is a precision digital pressure gauge with a ±0.05% FS total error band across 0 to 50 °C, available from −1…1 bar to 0…1,000 bar with resolution down to 0.0001 bar. Higher-precision versions reach ±0.025% or ±0.01% FS on absolute ranges of 10 bar and above, with accredited calibration available.
Its RS485 interface links up to 128 gauges to free Keller software, and it runs about 2,000 hours on a coin cell or from an 8–28 V DC supply. The 316L stainless steel sensor has a G¼ connection, the housing is IP65, and an intrinsically safe LEX1-Ei version is available.
Argonmark Ltd supplies Keller instruments across Bangladesh — Dhaka, Chattogram, Gazipur, Narayanganj and the gas fields, refineries, terminals and power plants beyond. Send us the model, range, process connection, output and any hazardous-area requirement, and we will confirm the right configuration, lead time and price.
Questions & answers
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