Name

Minimal-leakage meter
for piping

Model

QBS-LE

NSB-LE

Explosion
proof
construction

Non-explosion-proof

Intrinsically safe construction(i3nG5)

Object
to be
measured

Minimal liquid leaks from piping

Description

The minimal-leakage meter for piping is designed to detect, in a manufacturing process, liquid leaks from valves on process piping.
DITECH’s proprietary impedance bridge measurement system enables the detector to detect conventionally difficult trace amounts of leakage corresponding to 0.001 pF (1/1000). Consequently, the minimal-leakage meter is suitable for locations such as an important valve connector downstream on a pipeline that must not leak.

Operating
principles

The measurement circuitry is an impedance bridge circuit, one side of which is connected to a transducer to output a standardized signal of conductivity.

Specifications

Measurement system	Micro-capacitive system
Output signal	DC4～20mA　DC1～5V　※One of the above signal
Input power	Model QBS-LE (Model PS-0LE)：　AC105V/210V 50/60Hz or DC24V Model NSB-LE (Model PS-2)：　AC105V/210V 50/60Hz
Power consumption	10W
Allowable temperature	Detector：　－200℃～300℃ (Depends on the specifications) Transducer：　　Model PS-0LE：　－10℃～＋50℃ Transducer：　　Model TR-2LE：　－25℃～＋70℃ Power source：　Model PS-2：　　－10℃～＋50℃ Special cable：　 Model DSC-15 (high accuracy use)：　－10℃～＋60℃ Special cable：　 Model DSC-05 (small size)：　　　　　－10℃～＋60℃ Special cable：　 Model DSC-13 (heat resistance use)：　－50℃～＋200℃
Allowable load	Depends on the specifications
Allowable pressure	Detector：　20MPa (approx. 204kg/cm²G) (Depends on the specifications)
Weight	Transducer：　　Model PS-0LE：　5.5kg Transducer：　　Model TR-2LE：　4.3kg Power source：　Model PS-2：　　7.6kg
Size	Transducer：　　Model PS-0LE：　216(W)×125(D)×259(H) Transducer：　　Model TR-2LE：　200(W)×149(D)×220(H) Power source：　Model PS-2：　　250(W)×145(D)×275(H) (mm)
Surface treatment	Detector：　Inner surface polishing, etc.
Installation	Detector：　Flange mounting, etc.
Material	Detector：　SUS304　PTFE　Ceramic　Hastelloy, etc. Lining：　PTFE　Glass　Rubber, etc. Head case：　Light alloy　SUS304　Salt resistant paint case, etc.

Configuration

Model QBS-LE
(Non-explosion-proof type)
＜Separated transducer type＞

This model is composed of in-pipeline detector unit, transducer and special cable.

Detector

(piping type)

Transducer

PS-0LE

Special cable

DSC

Options (QBS-LE)

Integrated type indicator for detector

Integrated type indicator for transducer

Separated type indicator

Lightning arrestor

Monitoring device

Common options available for models

Configuration

Model NSB-LE
(Intrinsically safe construction / i3nG5)
＜Totally separated detector unit type＞

This model is composed of in-pipeline detector unit, transducer, relay power source and special cable that is 4 core control cable. As the transducer is designed to be installed in a dangerous area, the special cable can be made short enough to minimize picked-up noises, thus permitting a stable performance to be obtainable. As to performance, this model has the same characteristics as those of Model QBS-LE.