Leak detector for flammable gases IT-M Micro designed to detect leaks of natural gases according to GOST 5542-87 or liquefied hydrocarbon gases according to GOST 20448-90 from gas pipelines, fittings and technical equipment in explosive areas of premises and open spaces; as well as places of leaks of ammonia, hydrocarbons and freons used as a refrigerant in refrigeration units.

IT-M Micro provides an indication of an increase (decrease) in the content of flammable gases in the controlled environment relative to a level conventionally accepted as zero (background level).

Structurally, the housing and thermochemical sensor block located on the rod; cable length between the sensor and the housing is 2 m.

Scope of application of the IT-M Micro flammable gas leak detector: detection of leaks of liquefied (GOST 20448-90) and natural (GOST 5542-87) gases, hydrogen in open areas and premises of gas production and gas transportation, energy and other industries, as well as at the facilities of gas distribution organizations and during operation refrigeration equipment using ammonia, hydrocarbons, freons and freons as refrigerants.

Indicator type IT-M Micro - portable.

Principle of operation IT-M leak detector Micro - thermochemical.

Sample collection method– diffusion.

Leak detector IT-M Micro does not require verification, since it is not a measuring instrument.

The leak detector indicator IT-M Micro provides the following types of indication:

Specifications leak detector IT-M Micro

Leak detector indicator device IT-M Micro

Structurally The IT-M Micro indicator consists of housing and sensor block. The connection of the sensor block to the housing is permanent, using a cable. The indicator housing contains: a measurement and indication module and a battery unit, consisting of a battery and a battery protection module. The sensor block contains the TCD.

On the front panel of the leak detector indicator IT-M Micro located:

Graphic display (3);

Film keyboard with two keys for controlling the operating modes of the indicator (2);

Under the transparent case there are single red indicators designed to provide an EXCEEDING light alarm;

Sound emitter (5).

On the back cover of the indicator housing IT-M Micro There is a clip for attaching the indicator to a belt, pocket, etc. (9).

On the bottom wall of the leak detector housing there is a cover (1) covering the USB connector. The USB connector is designed to charge the indicator battery. Structurally, the connector is a mini-USB.

The protective cap protects the metal housing of the TCD (8) from possible contact with a surface that has a high electrostatic potential.

1 - cover covering the USB connector; 2 - film keyboard; 3 - graphic display; 4 - single alarm indicators EXCEEDING; 5 - sound emitter; 6 - sensor block cable; 7 - sensor block rod; 8 - TCD with a protective cap; 9 - clip; 10 - warning sign; 11 - warranty sticker; 12 - plate with explosion protection markings; 13 - nameplate.

1 - battery charge level indicator; 2 - “diagram” for indicating BACKGROUND, ABOVE, BELOW, EXCESS; 3 - indication of the process of setting the indicator background level.

Operating principle of the IT-M Micro leak detector indicator

The primary converter in the sensor unit is TCD, the operating principle of which is based on the oxidation of flammable gas on the surface of the catalyst, electrically heated to a temperature of 450 to 550 °C. Oxidation leads to an increase in the temperature of the sensitive element, proportional to the content of the detected flammable gas.

Structurally, the sensor consists of two sensitive elements installed close to each other, one of the elements is working, and the second is comparative. The working and comparative sensing elements are electrically similar to each other, but the comparative sensing element does not change its temperature and, therefore, its electrical resistance when in contact with flammable gas.

Scope of supply for IT-M Micro leak detector

Attention! The battery unit and TCD cannot be repaired.

The charger is included in the delivery package of the IT-M Micro leak detector.

Price:

Discounts are provided depending on the quantity of equipment ordered. In order to find out the exact price, send applications by e-mail [email protected] with return contact details.

Guidelines for performing practical work

Discipline: “Technical diagnostics of gas supply systems”

Topic: “Indicator - leak detector for flammable gases IT - M”

Specialty: 270111 “Installation and operation of equipment and gas supply systems”

Developed by a teacher

Guidelines for performing practical work No. 15

Subject:"Indicator - leak detector IT-M"

Goals: study the design and principle of operation of the indicator - leak detector IT-M

Interdisciplinary connections:“Operation of equipment and gas supply systems”, “Gas networks and installations”

Providing classes: guidelines for performing practical work, indicator - IT-M leak detector

Theoretical part

The indicator is intended to indicate an increase (decrease) in the content of flammable gases in the atmosphere relative to a level conventionally accepted as zero (background level).

Application area – detection of leaks of liquefied and natural gases from gas pipelines, fittings and technical equipment in explosive areas of premises and open spaces, as well as ammonia from refrigeration units.

Indicator type: wearable.

The operating principle is thermochemical.

Operating mode: periodic.

Sample collection method: diffusion

Structurally, the indicator consists of a housing and a thermochemical sensor located on the rod.

The indicator belongs to explosion-proof equipment and has an explosion-proof level provided by an intrinsically safe electrical circuit.

The indicator has a degree of protection against access to dangerous parts, against the ingress of external solid objects and from the penetration of water.

Indicator operating conditions:

Ambient temperature from minus 40 to plus 50 o C;

The range of relative humidity of the ambient air is from 30 to 98% at a temperature of 25 o C;

Range atmospheric pressure from 630 to 800 mm Hg. Art.;

natural gas – from 0 to 2.0;

liquefied gas – from 0 to 1.0;

ammonia – from 0 to 4.0;

The indicator has the following types of light indication and sound alarm:

- Green colour, indicating setting the indicator background by the volume fraction of flammable gases in the atmosphere at the operator’s location;

- continuous light indication Red (single indicators “1”, “2”, “3”), accompanied by an intermittent sound alarm , indicating an increase in the volume fraction of flammable gases relative to the background value;

- continuous light indication yellow and green colors about a decrease in the volume fraction of flammable gases relative to the background value;

- intermittent yellow light indication, accompanied by an intermittent sound alarm, indicating about battery discharge;

- intermittentred light indication(single indicators “1”, “2”, “3”), accompanied by a sound alarm with a swinging frequency, indicating about sensor breakage;

- intermittent light indication (single indicators “-”, “0”, “1”, “2”, “3”), accompanied by a sound alarmwith a swinging frequency, indicating that the volume fraction in the atmosphere at the operator’s location is exceeded, %:

natural gas – 2.0;

liquefied gas – 1.0;

ammonia – 4.0.

The indicator provides an indication of an increase (decrease) in the content of the volume fraction, relative to the background level, with a change of at least %:

Natural gas – 0.01;

Liquefied gas – 0.005;

Ammonia - 0.025.

Sensitivity adjustment is carried out for methane (CH 4).

The alarm response time when a methane-air mixture with a volume fraction of methane of 0.03 is supplied to the indicator is no more than 3 s.

The indicator warm-up time is no more than 60 s.

The indicator background level is adjusted in the range, %, volume fraction:

Natural gas – from 0 to 2.0;

Liquefied gas – from 0 to 1.0;

Ammonia – from 0 to 4.0.

The indicator is powered from a built-in rechargeable battery consisting of four batteries through an spark protection device.

The sound pressure level created by the indicator is at least 60 dB at a distance of 1 m.

Average time between indicator failures under operating conditions –

at least 25,000 hours, in which case it is possible to replace a thermochemical sensor (TCS) that has exhausted its service life.

After 10 years of operation, the indicator is subject to write-off in accordance with the “Rules for the use of technical devices at hazardous production facilities.”

Structurally, the indicator consists of a battery pack, which includes a battery and a spark protection device, a measuring board, an external TCD and a line of single indicators.

The connection of the sensor unit to the housing is permanent, using a cable no more than 2 m long.

At the top of the front panel of the indicator there is a line of single LED indicators (1).

On the side panel of the indicator there are:

On/Off button () (5);

White button (“ ”) (6);

Blue button (“ ”) (7);

Red button (AKK) (8);

Socket for connecting the charging and feeding device ZPU-1,2-4 (9).

The operation of a thermochemical sensor (TCS) is based onthermochemical principle , in which the thermal effect of combustion of flammable gases and vapors on the catalytically active surface of the measuring sensitive element (MSE) is determined.

To compensate for the influence of environmental conditions, the TCD contains a catalytically passive comparative sensing element (CSE).

According to the functional diagram of the indicator, it is powered by a battery consisting of four batteries.

The supply voltage from the battery pack (AB) is supplied to the measuring board through the spark protection device (IS).

The indicator is turned on using an electronic on-off circuit.

Sensing elements (SSE and ISE) of the TCD are included in a bridge circuit powered by a voltage source.

The central processing unit (CPU) turns on the power to the bridge circuit and controls the flow of current through the TCD (monitoring the break of the TCD).

The signal taken from the measuring bridge is amplified by a differential amplifier (DA) and fed to an analog-to-digital converter (ADC), which also receives voltages proportional to the current flowing through the TCD and the battery voltage.

The CPU also turns on the TCD, changes the remote control gain depending on the concentration (setting the background), interrogates the control and power buttons, as well as controls the sound and light signaling device.

The indicator has an "X" after the explosion protection marking, indicating special conditions to ensure safety during operation.

The explosion protection of the TCD is ensured by enclosing its sensitive elements in an explosion-proof shell.

The “explosion-proof enclosure” level of explosion protection is achieved by enclosing the TCD in a glass made of atomized bronze powder and placing the sensor in a protective housing made of stainless steel.

The strength of the shell is checked during the manufacture of the sensor.

The connection of the glass to the base of the sensor is made by gluing with an epoxy compound.

The integrity of the batteries, their connections to each other, and the spark protection board is ensured by placing the batteries in a separate box in the indicator housing.

Intrinsic safety of the indicator's electrical circuits is achieved by limiting the voltage and current in its electrical circuits to intrinsically safe values.

Special type of explosion protection (s) is ensured by the solidity of filling the spark protection device board with the compound.

Accepting applications for the supply of "IT-M Micro"
Telephone: 8-800-555-17-74
Email:
On-line:

— an individual automatic indicator-leak detector of flammable gases, designed to indicate an increase (decrease) in the content of flammable gases in a controlled environment relative to a level conventionally accepted as zero (background level).

Scope of application: detection of leaks of liquefied (according to GOST 20448-90) and natural (according to GOST 5542-87) gases, hydrogen in open areas and in the premises of gas production and gas transportation, energy and other industries, as well as at the facilities of gas distribution organizations and during the operation of refrigeration equipment using ammonia, hydrocarbons, freons and freons as refrigerants. The operating principle is thermochemical. The sampling method is diffusion. Structurally, the indicator consists of a housing and a thermochemical sensor unit located on the rod. The cable length between the sensor and the housing is 2 meters.

Functional Features

• low weight and dimensions of the device;
• explosion protection marking - 1ExibdIICT6Gb X;
• degree of protection against access to dangerous parts, ingress of solid objects and penetration of water - IP54;
• operating temperature range - from -40 to +50 °C;
• does not require verification, since it is not a measuring instrument;
• the period of continuous operation of the indicator without recharging is at least 8 hours under normal conditions;
• the average full service life of a thermochemical sensor is 5 years under normal conditions;
• The warranty period from the date of shipment to the consumer is 24 months for IT-M, 12 months for TCD.

Specifications

Application area: Work safety/Control of maximum permissible concentrations of flammable gases, Work safety/Control of maximum permissible concentrations of flammable gases. harmful substances

Type: Portable

Operating mode: Intermittent

Names of controlled components: C1-C5 Hydrocarbons (including liquefied petroleum gas), C4H10 Isobutane, CH4 Methane, H2 Hydrogen, NH3 Ammonia

Number of controlled components (with one device): 1

Explosion protection markings: 1ExibdIICT6

Price (excluding VAT): RUB 14,472.00.

Description

This is a flammable gas leak detector, which is an individual automatic alarm continuous action. designed to detect leaks of natural or liquefied liquids hydrocarbon gases

from gas pipelines in accordance with GOST 5542-87 and GOST 20448-90, respectively, as well as for technical equipment of premises and open spaces in explosive areas. The device is also used to detect leaks of gases that are used as a refrigerant in refrigeration units, such as ammonia, freon and other hydrocarbons. Leak detector

detects the content of flammable gases in a controlled environment relative to a level conventionally accepted as zero, the so-called background level, and provides an indication when they increase or decrease.

The design of the portable alarm is a housing with a thermochemical sensor block, which is located on a rod. The cable length between the sensor and the housing is 2 m.

The device has sound and light alarms.

• Areas of use:
• Open areas and premises of gas production and gas transportation, energy and other industries. Objects gas industry
• , basements, wells.
• When operating refrigeration equipment using ammonia and freons as refrigerants.

Features of the IT M Micro flammable gas leak detector:

• Light weight and overall dimensions.
• Individual indicator type.
• Diffusion method of sampling.
• Thermochemical operating principle.
• Does not require verification, since it is not a measuring instrument.

Metrological characteristics teyefinder

IT-M Micro

flammable gas leak detector

Purpose of the leak detector indicator IT-M Micro

Leak detector for flammable gases IT-M Micro designed to detect leaks of natural gases in accordance with GOST 5542-87 or liquefied hydrocarbon gases in accordance with GOST 20448-90 from gas pipelines, fittings and technical equipment in explosive areas of premises and open spaces; as well as places of leaks of ammonia, hydrocarbons and freons used as a refrigerant in refrigeration units.

IT-M Micro provides an indication of an increase (decrease) in the content of flammable gases in the controlled environment relative to a level conventionally accepted as zero (background level).

Structurally, the indicator IT-M Micro consists of housing and thermochemical sensor block located on the rod; cable length between the sensor and the housing is 2 m.

Scope of application of the IT-M Micro flammable gas leak detector: detection of leaks of liquefied (GOST 20448-90) and natural (GOST 5542-87) gases, hydrogen in open areas and premises of gas production and gas transportation, energy and other industries, as well as at the facilities of gas distribution organizations and during the operation of refrigeration equipment using as refrigerants of ammonia, hydrocarbons, freons and freons.

Indicator type- portable.

Operating principle of the leak detector IT-M Micro- thermochemical.

Sample collection method IT-M Micro- diffusion.

The IT-M Micro leak detector does not require verification, since it is not a measuring instrument.

The leak detector indicator IT-M Micro provides the following types of indication:

Specifications leak detector IT-M Micro

Leak detector indicator device IT-M Micro

Structurally The IT-M Micro indicator consists of housing and sensor block. The connection of the sensor block to the housing is permanent, using a cable. The indicator housing contains: a measurement and indication module and a battery unit, consisting of a battery and a battery protection module. The sensor block contains the TCD.

On the front panel of the leak detector indicator IT-M Micro located:

Graphic display (3);

Film keyboard with two keys for controlling the operating modes of the indicator (2);

Under the transparent case there are single red indicators designed to provide an EXCEEDING light alarm;

Sound emitter (5).

On the back cover of the indicator housing IT-M Micro There is a clip for attaching the indicator to a belt, pocket, etc. (9).

On the bottom wall of the leak detector housing there is a cover (1) covering the USB connector. The USB connector is designed to charge the indicator battery. Structurally, the connector is a mini-USB.

The protective cap protects the metal housing of the TCD (8) from possible contact with a surface that has a high electrostatic potential.

Appearance of the leak detector indicator IT-M Micro

1 - cover covering the USB connector; 2 - film keyboard; 3 - graphic display; 4 - single alarm indicators EXCEEDING; 5 - sound emitter; 6 - sensor block cable; 7 - sensor block rod; 8 - TCD with a protective cap; 9 - clip; 10 - warning sign; 11 - warranty sticker; 12 - plate with explosion protection markings; 13 - nameplate.

1 - battery charge level indicator; 2 - “diagram” for indicating BACKGROUND, ABOVE, BELOW, EXCESS; 3 - indication of the process of setting the indicator background level.

Operating principle of the IT-M Micro leak detector indicator

The primary converter in the sensor unit is TCD, the operating principle of which is based on the oxidation of flammable gas on the surface of the catalyst, electrically heated to a temperature of 450 to 550 °C. Oxidation leads to an increase in the temperature of the sensitive element, proportional to the content of the detected flammable gas.

Structurally, the sensor consists of two sensitive elements installed close to each other, one of the elements is working, and the second is comparative. The working and comparative sensing elements are electrically similar to each other, however, the comparative sensing element does not change its temperature and, therefore, its electrical resistance when in contact with a flammable gas.

Scope of supply for IT-M Micro leak detector

Attention! The battery unit and TCD cannot be repaired.

The charger is included in the delivery package of the IT-M Micro leak detector.

Prices are current as of 05/28/19.

Price list: