Lenora Digital Pressure Switch — view 2
Patented · Model DPS-300 AA

Digital
Pressure
Switch

Precision cut-in and cut-out control for reciprocating compressors. Replaces mechanical pressure switches with a digital display, push-button setting, and exact repeatability — engineered and manufactured in India.

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Application
Reciprocating
Compressors
IP Status
Patented
Made in
India
Lenora Digital Pressure Switch — front view
The Switch

Mechanical
Switches Are
Obsolete.

Traditional mechanical pressure switches use a spring-and-diaphragm mechanism to set cut-in and cut-out pressure — no display, no exact readout, and calibration drifts over time with vibration and temperature.

The Lenora Digital Pressure Switch gives you a live digital pressure readout, precise push-button set points, and consistent operation cycle after cycle — without any mechanical wear on the sensing element.

Model
DPS-300 AA
Power Supply
200–250V AC
Operating Pressure
0–213 PSI
Resolution
0.1 PSI
Display
7-Segment LED
IP Status
Patented
In Context

Where It Lives.

The Digital Pressure Switch mounts directly onto the compressor. Scroll to see exactly where it fits — and how it looks up close.

Full reciprocating compressor with digital pressure switch installed Compressor with pressure switch location highlighted Pressure switch callout — full detail
01 The System
System Features

One Device.
Six Functions.

PSI
Digital Pressure Gauge

Live accurate pressure readings in both BAR and PSI on the 7-segment display — eliminates the need for a separate analogue gauge on the compressor.

SW
Pressure Switch

Low and high pressure set points configured digitally. Controls the compressor automatically — starts on cut-in, stops on cut-out — with exact repeatability every cycle.

UL
Unloader Valve

Automatically releases clogged pressure from the line when the compressor stops — protecting the motor from starting under load.

HRS
Compressor Life Counter

Inbuilt running hours counter tracks total compressor operation time. Works as an oil change alarm indicator — alerts when the oil change schedule is due.

RUN
Continuous Run Protector

Monitors for continuous running beyond the configured hour limit — triggers an alarm to protect the compressor motor from overload and overheating.

ECO
Power Saver Mode

Configurable maximum continuous running hours setting. Shuts the compressor down automatically on unit fault — protecting equipment and reducing energy waste.

Auto-Scrolling Display

When idle, the display cycles through: Pressure in BAR → Pressure in PSI → Total Running Hours → Remaining Hours to Oil Change → Compressor Temperature (if sensor connected). All information visible at a glance, no key presses required.

Mechanical Switch

Imprecise.
Wear-Prone.
Unreadable.

Mechanical pressure switches rely on a spring calibrated against a diaphragm. Vibration from the compressor gradually shifts the calibration. There is no display — the operator cannot confirm the actual cut-in or cut-out pressure without external instrumentation.

Short-cycling, over-pressure, and premature motor wear are the predictable result of imprecise switching control.

Lenora Digital Switch

Exact.
Stable.
Always Visible.

Set the cut-in and cut-out pressure once via push button. The digital sensor holds that value precisely — vibration does not affect calibration. The LED display shows live system pressure at all times.

"Precision control for reciprocating compressors — with a live digital readout you can actually read."
Technical Specifications

DPS-300 AA
Data Sheet

Operating Specifications
DPS-300 AA — Technical Data
Power Supply200VAC – 250VAC
Operating Pressure0 – 213 PSI (15 Kg/Cm²)
Burst Pressure300 PSI (21 Kg/Cm²) Approx.
Pressure Sensor Range290 PSI (20 Kg/Cm²)
Measuring Resolution0.1 PSI (0.01 Kg/Cm²)
Display Resolution0.1 PSI (0.01 Kg/Cm²)
Display Type7-Segment LED Display
IndicationsDisplay, Alarm, and Buzzer
Input Keys4 Feather Touch Keys (Mode, +, −, Enter)
Sensor OriginAmerican Sensor
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