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New generation: DP air leak tester High-performance standard type


Further user-friendliness with new features such as Quick Access improved from its predecessor.

This truly new generation air tester combines the experience and know-how that Cosmo Instruments has nurtured over many years, with new functions and the newest technology.

Adopted touch panel color LED.
The icon display on the menu screen is simple and intuitive, and the reportedly difficult operation of the instrument has been revamped.
Anyone can use it right away.
The measurement screen is available in 6 different types for different situations, including a simple display and a detailed display, and a display in which you can observe measured waveforms.
The LS-R902 is a new air leak tester that meets a variety of demands.

Edge & Function

Quick Access

Directly access the screen of some screen you often to use.

Industrial Field Network (Option)

I/O wiring is completed with dedicated cable connectors.Supports smooth communication with PLC with fewer cables.Test results can be output to the network.

Simple to operate with icons.

The menu screen is easily displayed with an icon.
The Home icon can move directly to the measurement screen, and the (i) icon in the upper left displays all sort of information.

Can switch between 6 kinds of measurement screen

The measurement screen is available in 6 different types for different applications/situations, including a simple display and a detailed display.
Also, the display items can be customized.

Each type of settings screen

During setup, a large numeric keypad appears, and all types of settings can be adjusted using the simple screen display.

A complete help screen and help display

In the help screen, complete explanations of computational tools and peripheral devices are available.

Waveform monitor function for test pressure/DP (leak volume)

Displays the test pressure and DP waveforms from measurement start to detection completion.
The ideal time for applying pressure and attempting detection can be found.

Phoenix Contact product is used for input/output connector

Phoenix Contact product was adopted for the connector of the input/output interface.
The connector is very reliable, and the wiring work can be done with a flat-head screwdriver, so that the work efficiency increases.

Automatic setup function

Several setting are necessary for the leak test.
This function provides initial settings for measurement time when first implementing the leak test.

Easy data collection with USB port

Measurement data is automatically saved to USB memory.
Other settings information can also be backed up with USB memory.

Waveform Pneumatic Circuit Diagnosis

Checks for anomalies in the air circuit with workpiece at each operation.
(Attention) Effectiveness varies based on operating conditions, and there are cases when it cannot be used.

Function for switching between display of multiple languages

Supports Japanese, English, Chinese, Korean, German, Spanish, and Portuguese.
Overseas expansion is simple.


Differential pressure Resolving power
Precision guaranteed range
Excess pressure on sensors
Differential pressure
0.1 Pa
±1000 Pa
5 MPa
±2.5% of rdg ±1Pa, however 50Pa or below is ±2Pa
Display units Test Pressure: kPa、MPa
(Non-SI units available for overseas: PSI, kg/cm2, bar, mbar, mmHg, cmHg, inHg, etc.)
Leak volume mL/min, L/min, mL/s, Pa/s, Pa/min, Pa, kPa, Pa・m3/s, E-3 Pa・m3/s, etc.
(Non-SI units available for overseas: mmH20, mmHg, inH20, etc.)
Displayed leak volume 3 to 5 digits (floating point), sample rate: 10/second
Number of Channels 32ch(0~31)
Timer setting range 999.9 seconds (resolving power: 0.1 second)
Power Source AC100~240V±10%, 50/60Hz, 80VAmax
Test pressure source Uses clean air.The original pressure must be sufficiently higher than the test pressure.
Pilot pressure source Applies 400 to 700kPa of clean air.
CPU Cortex-A9 800MHz 512MB DDR3
Pipe connection diameter Rc1/4 (test pressure supply, pilot air supply, workpiece piping, master piping)
Ambient temperature Operating temperature  5 to 45°C  Storage temperature:  -20 to 60°C
Humidity 80 %RH or less  No dew condensation
Mass Approx. 140kg (standard specifications)
Serial communications RS232C-based
2 port
I/F fixed length output Leak data and set values are outputted simultaneously
ID/F fixed length output
Standard settings
Leak data and set values are outputted simultaneously
T/F fixed length output Only leak data outputted
USB Port Saving data Saves decisions, leak values, correction values, test pressure, WK#, CH#,  and time on inserted memory.
(Automatic file creation every 24 hours)
Set values storage All channel settings, system settings, etc.
Standard accessories Power cord For use in Japan:  Rating: AC125V/7A, length: 3m

For export:   Rating: AC240V/10A, length: 2m (CE conformant product)

Interface connector (I/O), caps (2) for RS-232C, USB cover, test report, traceability documents, user manual
Peripherals Master chamber, leak master, bypass unit, external exhaust valve, etc.


■ Model LS-R902 – A B – Options

A Measurement Circuit Intelligent 1 Pneumatic Circuit A1 Large air flow rate, and sensor protecting circuits are included.
Intelligent 2 Pneumatic Circuit A2 Uses two-way delivery valve, reliability is ensured and self-check functions are fully available.
Circuit for micro volumes AS01 For target workpieces 10 mL or less (standard) with standard leak values that are particularly small
A1 circuit for small volumes AS1 Used for workpiece volumes 100 mL or less, when high detection capability is required.
External pressure detection circuit C External pressure detection type (secondary pressure method)
B Test pressure range and control pressure specifications Precision regulator specifications For micro pressures L02 Operating range: 5 to 20 kPA (PS 20 kPa, pressure control valve: 200 kPa)
For low pressure L Operating range: 10 to 100 kPA (PS 100 kPa, pressure control valve: 200 kPa)
For medium pressure M Operating range: 50 to 800 kPA (PS 1 MPa, pressure control valve: 0.8 MPa)
For high pressure H20 Operating range: 2.0 MPa or less (PS 2 MPa, no pressure control valve)
For extremely high pressure H49 Operating range: 4.9 MPa or less (PS 5 MPa, no pressure control valve, filter)
For vacuum V Operating range: -5 to 100 kPA (PS -100 kPa)
Electro-pneumatic regulator specifications For low pressure LR Operating range: 10 to 95 kPA (PS 100 kPa, pressure control valve: 100 kPa)
For medium pressure MR Operating range: 50 to 800 kPA (PS 1 MPa, pressure control valve: 0.9 MPa)
For vacuum VR Operating range: -5 to -75 kPA (PS -100 kPa, pressure control valve: -80 kPa)
Calibrator J Leak MasterBuilt-in control valve During K (Ve) calibration and K (Ve) check, the calibration port automatically opens and closes.  Does not support high and extremely high pressures. (Special orders possible depending on conditions)

Leak Master is sold separately.

K05 Equipped with ALC-0 *1 Suitable for low pressure/medium pressure/high pressure Suitable for small-volume workpieces
K1 Equipped with ALC-1 *1 Suitable for low pressure/medium pressure/high pressure Suitable for small/medium-volume workpieces
K4 Equipped with ALC-4 *1 Suitable for low pressure/medium pressure/vacuum Suitable for medium/large-volume workpieces
K10 Equipped with ALC-10 *1 Suitable for low pressure/medium pressure/vacuum Suitable for large-volume workpieces
Bypass support/reducing valve not included B The valve that controls the bypass unit is built in.Bypass Unit is sold separately.
Compound pressure P sensor PV1 Compound pressure test sensor is built in. Sensor range: -100 ~ 1000 kPa
Sensor range: ± 100 kPa
Nylon filter case RX02 The filter case of the pilot pressure connection is made of nylon.
RX03 The filter case of the test pressure and pilot pressure connection is made of nylon.
 Temperature Compensation RX09 TCU ports (IN, OUT) provided on the rear panel without TCU
RX10 TCU ports (IN, OUT) + TCU (Temperature Compensation Unit), sensors and cables sold as a set
RX11  100 Channels
 Network N2  Industrial Field Network  Four types available by function
Wide range DP display D4 DP sensor range  ±10 kPa  Resolving power (minimum display): 1 Pa

*1 ALC = Auto Leak Calibrator