Multi Pneumatic Tester

The LS-1881 consists of a Windows®-based Controller Unit that can handle up to 8 separate Pneumatic Units to achieve high-speed production rates. This leak test package can also be used to simultaneously test multiple cavities on a single production part. Utilizing the same patented Differential Pressure Sensor (DPS) as the LS-1842 Air Leak Tester, the LS-1881 Unit allows for a wide variety of quality control features as well as easy operation, all viewed and controlled from a large, full color touch panel LCD.

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Multiple Pneumatic Circuit Units
With the ability to connect up to 8 units, the LS-1881 reduces facility costs and the space required to operate. This allows for maximum efficiency and productivity within a limited amount of space.
Simple Wiring
Thanks to the simplicity of the wiring, the LS-1881 greatly reduces the number of hours for machine-building. Also, it allows for the I/O units to be installed on the control board directly, providing a simple connectiong between the pneumatic circuit units.
Selective Measurement Display
The LS-1881 allows the selection of different types of display such as compensation value, test pressures, and others as well as the leak value. Different modes accompny this feature giving the user the ability to select one, two, four, or eight measuresments as once.
Substantial Help Mode
The contents of the help mode allows the user to display error lists and probable causes to narrow down the source of the problem. When the LS-1881 defects a fault, it instantly checks the status of the input and output signals on the I/O monitor screen.
Quality Control Features
The LS-1881 allows up to 1,000 data values per station and can be graphed directly on the machine with the Quality Control (QC) function. The measured data can then be analyzed using a computer for further understanding and manipulation via a USB device.
Product Specifications
Standard Features

Intelligent II Pneumatic Circuit

Air-operated valve performance check
DPS sensitivity check
Equipment Valve
Weight saving
Large flow capacity

Charge Hold

Used to spot the location of the leak


Measurement of the equivalent Internal Volume
K (Ve) Differential pressure sensor offset and span calibration
Test pressure sensor offset and span calibration

Leak Limits

Two-level limit setting (DET HH, DET Hi, DET Lo, DET LL)
Noise reduction

Drift Compensation



Air-operated valve performance
DPS sensitivity
Stop valve open/close
Sensor offset
CPU performance

Exhaust Interference Prevention

Controlling the exhaust timing of the pneumatic circuit units

Sensor Protection (Exhaust air blow)

Cleaning pneumatic circuit at the end of every test cycle

Sensor Protection (External exhaust valve)

A separate external exhause valve unit (G3-M) is required


Synchronize the start and the end (exhaust) of the selected station

General Specifications

Differential Pressure

Minimum Reading

Reading Accuracy

Sensor Range

Proof Pressure

0.1 Pa

±2.5% of rdg ±1 Pa
±2.5% of rdg ±1 Pa for range above 50 Pa
±2 Pa for 0-50Pa range

±1500 Pa

5 mPa

Display Unit

Test Pressure

Leak Rate


mPa, kPa (PSI, kg/cm2, bar, mbar, mmHg, cmHg, inHg) *1

Pa, kPa, mL/s, mL/min, L/min
(mmH20, inH20, mmHg, in3/min, in3/d) *1

mL, L (in3, ft3) *1

Number of Stations

Up to 8 stations

Number of Channels

32ch (0 ~ 31)