+5V

Alarm

signal

LPM2610

1

3

4

5

GAS

2

TH

Sensor

(TGS

2610)

PRODUCT INFORMATION

Applications:

Features:

* Residential LP gas alarm

The LPM2610 is a pre-calibrated module for LP gas alarms which is precisely

calibrated in Figaro’s humidity and temperature controlled facility. The module uses

TGS2610-D00 which incorporates a filter to eliminate the influence of interference

gases such as alcohol, resulting in highly selective response to LP gas.

The most important process in manufacturing reliable resdential gas alarms

is adjusting the alarm point. Calibration is a complicated and time consuming

process which also requires a substantial investment in calibration equipment. By

eliminating the costly calibration process, this module enables users to easily and

simply manufacture residential LP gas alarms. Figaro has taken the complexity

out of designing a gas detector circuit by providing users with a temperature

compensation circuit which combines a built-in thermistor and individually adjusted

load resistor together with Figaro’s low power LP gas sensor.

A connector allows easy replacement of the module for the purpose of periodic sensor renewal. This input/output connector

enables easy installation of the module into the gas detectors’ mother board. This same mother board can be used for both

methane and LP gas detectors by simply changing the module.

This module is designed to meet the performance requirements of EN50194 and UL1484.

Please refer to “

Technical Information for TGS2610” for sensor sensitivity characteristics. Refer to “Application Notes for TGS2610”

for further information regarding circuit design.

* Factory calibrated

* Temperature compensation circuit

* Interferent-resistant sensor TGS2610

* Compact size

* Meets RoHS regulations

IMPORTANT NOTE: OPERATING CONDITIONS IN WHICH FIGARO SENSORS ARE USED WILL VARY WITH EACH CUSTOMER’S SPECIFIC APPLICATIONS. FIGARO STRONGLY

RECOMMENDS CONSULTING OUR TECHNICAL STAFF BEFORE DEPLOYING FIGARO SENSORS IN YOUR APPLICATION AND, IN PARTICULAR, WHEN CUSTOMER’S TARGET

GASES ARE NOT LISTED HEREIN. FIGARO CANNOT ASSUME ANY RESPONSIBILITY FOR ANY USE OF ITS SENSORS IN A PRODUCT OR APPLICATION FOR WHICH SENSOR HAS

NOT BEEN SPECIFICALLY TESTED BY FIGARO.

Basic Pin Connection

Circuit Diagram

A regulated voltage of 5V DC should be applied to Pin #1.

A voltage comparator should be connected to Pins #2 and

3. A circuit for detecting breakage of the heater may be

connected to Pin #4 (in which case, Pins #4 and 5 should

be connected separately to the GND).

When the gas sensor module is exposed to a concentration

of target gas which exceeds the desired alarming point,

causing the module to reach the alarm condition.

NOTE:As described in Sec. 2-6 of “

TechnicalInformationfor

TGS2610”, when energizing the sensor after an unpowered

period,thesensor’sresistance(Rs)dropssharplyforthefirst

few seconds after energizing, regardless of the presence

of gases, before recovering to a stable level. This ‘initial

action’ may cause activation of an alarm during the first

To prevent unnecessary alarms during sensor warmup,

a circuit modification such as that shown in Sec. 1-7 of

“

Application Notes for TGS2610” should be used.

Output voltage

Circuit current

Heater current