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DP air leak tester that switches between two circuits for test pressure


Two different types of pressure ranges can be tested using just one tester!

The newly available LS-R912 has touch panel operation, quality control with USB, multilingual support, etc. continuing with the convenience and easy of use of the LS-R902, and allowing for the testing of two different types of pressure ranges with just one tester.

The LS-R912 is a new leak tester that meets a variety of demands

Edge & Function

You can switch between two different types of test pressure ranges

The combination of test pressure ranges of 2 circuits (Inlet-A/Inlet-B) can be chosen from the support table below.
Of the combinations of various pressure ranges, choose two types that meet your demands from the table below. 

For tests where different ranges of test pressure are used with a single product

Test 1 location Test pressure 2 ranges

(Attention) Keep in mind that you cannot run test 1 and 2 simultaneously.

For example, this kind of product

For tests where 2 different ranges of test pressure are used for multiple test locations in a single product(A valve is needed for switching to a separate testing location.)

Test 3 locations Test pressure 2 ranges

(Attention) Keep in mind that you cannot run test 1 and 2 simultaneously.

For example, this kind of product

Fine tuning of the test pressure is now simple.

Pressure is applied to the workpiece.
If you push the button above, it will be shifted to the following button for easy fine tuning of the pressure.

Pressure can be easily fine tuned without applying pressure to the workpiece.

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

Regarding the convenient functions of the LS-R902 which are included in the LS-R912, please consult the LS-R902 page.
Link --> LS-R902 product information


DP sensor and display (standard) Resolving power
Display range
Sensor range
Excess pressure on sensors
Display precision *1
0.1 Pa
±2500 Pa
±1000 Pa
±2000 Pa
5 MPa
±2.5% of rdg ±1Pa、However 50Pa following ± 2Pa
Test Pressure Sensor and Display Display precision ±1% of F.S. ±1 digit (linearity, hysteresis, reproducibility)
Temperature properties ±0.1% of F.S. / °C
Display units *2 Test Pressure: kPa, MPa (PSI, kg/cm2, bar, mbar, mmHg, cmHg, inHg)
Leak volume Pa, kPa, mL/s, mL/min, L/min, Pa・m3/s, E-3 Pa・m3/s, Pa/s, Pa/min,
(mmH2O, inH2O, mmHg, in3/min, in3/d, ft3/h)
Leak volume display 3 to 5 digits (floating point), sample rate: 10/second
Leak limit (standard) ±999.9Pa or less
Number of Channels 32 channels(#0 to #31), Option 100 channels(#0 to #99)
Timer setting range 999.9 seconds (resolving power: 0.1 second)
Power Source AC100 to 240V±10%, 50/60Hz, 80VAmax
Fuse (T2.5A 250V)
Dielectric strength and resistance AC1400V 10 sec, DC500V 50MΩ
Internal solenoid power supply:  DC24V
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.
LCD/TP 5.7 inch color LED 640 x 480 pixels (VGA)
Pipe connection diameter Rc(PT) 1/4 test pressure supply, pilot air supply, workpiece piping, master piping
Ambient temperature Operating temperature  5 to 45°C  Storage temperature:  -20 to 60°C
Consult if using in a high temperature environment.
Humidity 80 %RH or less  No dew condensation
Mass Approx. 13.5 to 17.5 kg(Depends on the model)
Serial communications RS232C-based
2 port
I/F fixed length
ID/F fixed length
Serial communications RS232C-based
2 port
USB port
T/F fixed length Test parameters as well as test results are transmitted
Other formats Only test results are transmitted
Test data
USB Port Copy CSV to USB Judgement, Leak, Compensation value
Test pressure, Channel#, timers, etc.
LAN Port FTP server
(In preparation)
csv file
Calibration/Maintenance Ports M10 x 1.5 (O-ring seal)
E/P Regulator Repeatability:  ±0.5% of F.S. or less
Temperature Characteristics:  ±0.16% of F.S./°C
Standard Accessories Power cord
For Japan:Rating: 125 VAC/7A, Length: 3 m
For overseas:Rating: 250 VAC/10A, Length: 2 m(CE conformes)
Control I/O connector, USB port cover, Inspection record, Traceability documents, Operation manual CD
Environmental Conditions
(IEC 61010-1)
Over voltage category II
pollution degree 2
Altitude 3000 m or lower
Protection class I
Place to use: Indoor
Peripherals Master chamber, leak master, bypass unit, external exhaust valve, etc.

*1 The display precision is that at the time of delivery.
The precision when inspecting and calibrating is ± 5% of rdg ±1Pa.
The precision of the DP display of the option, wide range is ± 5% of rdg ±0.01kPa.
*2 The unit ( ) is not fixed in the SI unit specifications.
NOTE:   If using overseas, please use a power cord that conforms to the respective country’s norms and regulations.


■ Model LS-R912 – (1)(2)(3)(4)(5)

(1) Pneumatic Circuit A1: Intelligent 1 Pneumatic Circuit, A2: Intelligent 2 Pneumatic Circuit,
AS01: Micro Volume Circuit, C: Secondary Pressure Circuit
(2) Pressure Range
E/P Regulator LR: 10 to 95 kPa, MR: 50 to 800 kPa, VR: -5 to -75 kPa
Precision Regulator L02: 5 to 20 kPa, L: 10 to 100 kPa, M: 50 to 800 kPa,
H20: 2.0 MPa or less *1, H49: 4.9 MPa or less *1
(3) Pressure Range
E/P Regulator LR: 10 to 95 kPa, MR: 50 to 800 kPa, VR: -5 to -75 kPa
Precision Regulator L02: 5 to 20 kPa, L: 10 to 100 kPa, M: 50 to 800 kPa
V: -5 to -100 kPa
(4) Options J: With CAL Driving Valve for Leak Master,
K05: Come with ALC-05(0.5mL),K1: Come with ALC-1(1mL),
K4: Come with ALC-4(4mL), K10: Come with ALC-10(10mL),
B: Bypass Circuit ready without Precision regulator *2, D: DPS range ±10 kPa, Industrial Field Network: Ethernet(Contact COSMO)
(5) Power Cord VA: 125VAC 3m, VE: 250VAC 2m, VK: 250VAC 2m(Only for Chinese customers)

*1: H20 and H49 models come with no regulator.
*2: B: Inlet B only.