The NAP-50A / NAP-55A / NAP-66A Range

Our most popular catalytic gas sensor range, with over 2.5 million devices manufactured annually, and we think the best value catalytic flammable gas sensor on the market today. Originally designed primarily for low-cost residential gas detectors, but these days finding a wide variety of other applications due to performance levels surpassing many other catalytic sensors with a much higher price tag.

Specifications


Detectable gas:

All Flammable (explosive) Gases and Vapours

Range

0 – 50%LEL

Recommended Voltage

2.6V +/- 0.25V

Current Drawn  

170 +/- 10mA

Zero Offset 

0mV +/- 35mV

Output Sensitivity

12-16mV @3000ppm CH4

Repeatability

+/- 0.5mV

Response Time (T90) 

8 secs

Maximum Long Term Drift

<+/- 2mV/year

<+/- 2%/month

Expected Lfetime

>5 years



Operating conditions


Temperature Range

-10°C to +50°C

Humidity  

 0-95%RH, non-condensing

NAP-55A Catalytic (Pellistor) Flammable Gas Sensor

General Description:

The Nemoto NAP-55A is a catalytic (pellistor) type flammable gas sensor supplied as a matched pair of catalytic elements mounted on a single header enclosed in a plastic housing and protected by a metal mesh. Designed as a gas sensor for general use in a wide range of flammable / explosive gas detectors, the sensor detects and measures the presence of flammable gases and vapours in air, in the range 0-50% of the Lower Explosive Limit (LEL) of the gas or vapour being measured.

NAP-50A Catalytic (Pellistor) Flammable Gas Sensor

The popular NAP-50A sensor s identical in performance, and operates to precisely the same specification as the NAP-55A,  but is slightly modified to reduce the effect of potential cross sensitive gases likely to be encountered in domestic premises, particularly Ethanol, in compliance with the European standard for domestic methane / natural gas detectors, EN 50194.

NAP-66A Catalytic (Pellistor) LPG /Gasoline Sensor

The NAP-66A Gas Sensor is a low–cost Catalytic Flammable Gas Sensor designed for the detection and measurement of Propane, Butane, and LPG vapours in the range 0-50% LEL.

Developed primarily for use in Residential Gas Detectors, the NAP-66A has also been found to be useful in a wide variety of applications where reliable detection of gas or fuel leaks and other gas hazards is required at low cost.


Specifications 


Detectable gas:

Optimised for detection of LPG /Propane / Butane  / Gasoline

Range

0 – 50%LEL

Recommended Voltage

2.0V +/- 0.2V

Current Drawn  

150 +/- 10mA

Zero Offset 

0mV +/- 35mV

Output Sensitivity

Typically 16mV @2000ppm C4H10

Repeatability

Zero:     +/- 0.5mV


Span:     +/- 0.5mV

Response Time (T90) 

Span:         8 secs

Maximum Long Term Drift

<+/- 2mV/year

<+/- 2%/month

Expected Lifetime

>5 years



Operating conditions


Temperature Range

-10°C to +50°C

Humidity  

 0-95%RH, non-condensing