NG # 02638-HW-KELLER-014
The Keller LEX1 is a high-precision, microprocessor-controlled digital pressure gauge designed for calibration standards, field testing, and laboratory verification. Known for its exceptional accuracy ($\pm0.05\,\%\text{FS}$ typical), it processes readings with onboard mathematical error compensation across temperature fluctuations and features a min/max memory function that captures rapid pressure peaks.
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Stock
Custom Pricing
Get A QuoteThe gauge samples pressure up to 200 times per second in peak mode, allowing it to record dynamic pressure spikes and water-hammer effects that standard mechanical gauges miss.
Zero Tare / Offset Adjustment: Users can easily zero-point recalibrate or re-tare the current pressure setting via the front two-button interface.
| Parameter | Specification Details |
| Pressure Ranges | $-1\dots 2\text{ bar}$ up to $0\dots 1000\text{ bar}$ (Absolute or Sealed Gauge) |
| Standard Accuracy | $\pm 0.05\,\%\text{FS}$ total error band ($0\text{ °C}$ to $50\text{ °C}$) |
| Precision Version (LEX1-Ei) | $\pm 0.01\,\%\text{FS}$ or $\pm 0.025\,\%\text{FS}$ (optional high-precision calibration) |
| Display | 5-digit LCD display with secondary display line for Min/Max or units |
| Measuring Interval | Standard: 2 measurements/sec; Fast Mode: up to 200 measurements/sec |
| Selectable Units | bar, mbar, hPa, kPa, MPa, PSI, kp/cm² |
| Operating Temperature | $0\text{ °C}$ to $+50\text{ °C}$ |
| Battery Life | Up to 2,000 hours of continuous operation (3V CR2430 coin cell) |
| Pressure Connection | G 1/4" male standard (316L / 1.4435 stainless steel) |
| Digital Interface | RS485 bus protocol (via rear interface socket for PC software connection) |
| Intrinsically Safe Version | LEX1-Ei: ATEX certified for hazardous zones (Zone 0: Ex II 1 G Ex ia IIC T6 to T4) |
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