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DP Leak Tester Compact Type


In pursuit of excellent detection ability and cost performance

The LS-1866 is a DP air leak tester for testing the airtightness of all types of components/products, and allows for the automation of the leak testing process

●Equipped with high sensitivity/highly pressure resistant DP sensor as well as a heat resistant air controlled valve
●The basic circuit, a high-performance, exceptionally safe intelligent air circuit runs checks on valve operation and sensor sensitivity during each test.
●The master preset function and NR mode function make possible an improvement in detection ability and a decrease in test times.
●Channel functions are also available, allowing for compatibility with many types of workpieces.


Differential pressure Minimum display 0.1Pa(Standard)
Display range ±999Pa
Excess pressure on sensors 5Mpa
Leak volume display range 0.00~±999mL/min(Auto range
Alarm setting range 0~±999
Number of Channels 16
Timer setting range 0~999.8s (Setting is infinite)
Power Source AC100~240V±10%, 50/60Hz, 70VAmax
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.
Pipe connection diameter Rc1/4 (air pressure source, workpiece piping, master piping), 6mm one-touch joint (pilot air source) (the pilot air source of pressure range M, L are connected to the air pressure source with a 6mm tube.)
Transmission function Serial port RS-232C (printer mode setting possible)
Ambient temperature/humidity 5 to 40°C/80%RH or less, however no dew condensation
Weight Approx. 6.3kg (H type: approx. 8kg)
Standard fittings and accessories (Fitting to main body) regulator, oil mist separator, filter regulator for pilot pressure
(Accessories) Quick mounting bracket, interface connector, power cord, inspection report, user manual, traceability documents


■ Model LS-1866(ABC.D)

A, B and D in the model notation are mandatory.

A Pneumatic Intelligent 1 Pneumatic Circuit A1 Large flow circuit with great sensor protection features
Micro Volume Circuit AS01 For the parts whose volume is approx.
10 mL or smaller and the leak specifications are quite small.
B Test Pressure
Medium pressure M Test pressure range 50 to 800 kPa
(PS 1 MPa, Regulator 0.8 MPa)
Low pressure L Test pressure range 10 to 95 kPa
(PS 100 kPa, Regulator 200 kPa)
Vacuum pressure V Test pressure range -5 to -100 kPa
(PS -100 kPa, Regulator -100 kPa)
High pressure H10 Test pressure range 100 to 990 kPa
(PS 1 MPa, Regulator 1 MPa)
High pressure H15 Test pressure range 0.5 to 1.5 MPa
(PS 2 MPa, Regulator 2 MPa)
C Option External Exhaust Valve Ready *1 G External Exhaust Valve is sold separately.
Blow Orifice Ø 1.2 *2 F1 Standard orifice changed from Ø 3.2 to Ø 1.2
DPS 10 kPa D4 Sensor range: ±10 kPa Resolution: 1 Pa
D Power Cable VA 125 V (3 m)
VE 250 V (2 m)
VK 250 V (2 m) (Only for Chinese customers)

*1 Standard specification. Not selectable for Vacuum (V).
*2 Required for AS01. Also, select when the test pressure is -10 to -4 kPa.