XAR-H H2S Gas Detector

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XAR-H H2S Gas Detector

XAR-H is a precise gas detector for monitoring hydrogen sulfide (H2S) in the workplace. It has been designed to notify of the presence of H2S gas.

XAR-H H2S Gas Detector


Santacary XAR-H is a precise gas detector for monitoring hydrogen sulfide (H2S) in the workplace. It has been designed to notify of the presence of H2S gas.

Hydrogen sulfide is a colorless, flammable, extremely hazardous gas with a “rotten egg” smell. It is heavier than air and can collect in low-lying and enclosed poorly ventilated areas. The XAR-H will continuously display the concentration of H2S and activate its audible alarms whenever the preset set points are exceeded.

XAR-H can be widely used in iron smelters, oil refineries and petrochemical plant, oil and gas wells, tanks and compressor stations, offshore drilling, steel mills, landfills, food processing plants, breweries, wastewater facilities, pulp and paper industry, incoming cylinder inspection, process or emission gas analysis, and manure processing buildings etc.. In the above scenario, XAR-H can be used to avoid unhealthy and accidents caused by hydrogen sulfide produced in the workplaces.


Features

Portable H2S gas detector

H2S gas detector range: 0 ~ 500 PPM. Resolution: 1.0 PPM

Using 3-electrodes electrochemical H2S sensors, high precision

Support auto zero and span calibration

One press to restore factory setting, free from the bother of mis-operation

Audible alarm

Two set points of instantaneous alarm

Trend chart display showing the past readings for H2S

With temperature and humidity measurement

Only two buttons and easy to operate

Four AA Alkaline Batteries

 

Theory of Operation

The Santacary XAR-H H2S Gas Detector uses 3-electrode electrochemical technology, operating by the diffusion principle, for determining the concentration of H2S in air samples. In diffusion mode, the atmosphere reaches the sensor by diffusing through the air sampling ports on beside and top of the detector. Normal air movements are enough to carry the sample to the sensor.

 

Unit Description

Device

1.        Liquid crystal display (LCD)

2.        Power button

3.        Function button

4.        Battery compartment back cover

5.        Air sampling ports

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Normal Display

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1.        Alarm Status (None/Low Alarm/High Alarm)

2.        Battery Life Indicator

3.        H2S concentration

4.        H2S concentration unit in PPM

5.        Air Temperature

6.        % Relative Humidity


Calibration of Detector

This detector can implement span calibration when needed. Below is the guideline.

1.   Calibrate the detector at least once every 180 days depending on the use and sensor exposure to poisons and contaminants.

2.   Calibrate the detector if the ambient gas display varies at startup.

3.   Calibrate only in a clean atmosphere, which is free of H2S gas.


Calibration Menu

Menu Items

Functional Description

Fresh Air   Calibration 0 PPM H2S

The XAR-H will   perform an automatic fresh air adjustment (to zero the sensor). If the fresh   air adjustment is successful, the unit will proceed to Normal Display

H2S Span   Calibration 25 PPM

To implement the   span calibration with 25 PPM H2S gas. If the span calibration is   successful, the unit will proceed to Normal Display

Factory Reset

To restore   factory settings. One press to restore factory setting, free from the bother   of mis-operation

Exit

Exit the Menu and   proceed to Normal Display


Alarm

Low Alarm and High Alarm

XAR-H has two alarm set points: High Alarm (H2S: 15 PPM) and Low Alarm (H2S: 10 PPM).These set points are factory set and cannot be changed. XAR-H is equipped with audio alarms to alert you when the ambient gas concentration exceeds one of the two alarm set points. When H2S value exceeds the defined high alarm set point (15 PPM), the audio alarm will sound at 3 beeps/sec. When H2S value exceeds the defined low alarm set point (10 PPM) but less than the defined high alarm set point (15 PPM), the audio alarm will sound at 2 beeps/sec.

 

Factory Alarm Set points

Gas

Low

High

H2S

10 PPM

15 PPM

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Specifications

H2S Sensor Specification:

Measurement Range

0 ~500 PPM

Resolution

1.0 PPM

Repeatability

<±5% of signal

Sample Method

Diffusion

Temperature Range

-20 to 40°C (-4°F ~ 104°F)

Humidity Range

15 to 90%RH

Response Time

<30 seconds

 

Temperature Specification

Temperature Range

-10.0~60.0°C (14~140°F) display

Display Resolution

0.1°C (0.1°F)

Display Options

°C/°F switchable

Accuracy

±0.5°C (±0.9°F)

Response Time

5~30 seconds (device must equilibrate with   environment)

 

RH Specification

Measurement   Range

0.0~99.9%RH

Display   Resolution

1%RH

Accuracy

±4.5%RH

Response Time

<8 seconds   for 63% of step change

 

General Specification

Operating

-10°C to40°C (14°F to 104°F),15~90%   RH non-condensing

Storage

-10°C to 60°C (14°F to   140°F),<99% RH non-condensing

Power Supply

Four AA Alkaline Batteries

Dimensions

75x165x25mm (2.95x6.49x0.98”)

Weight

125 grams (4.41 oz.)   without batteries

 

Out of range of operating conditions will impact the accurate of H2S measurement.

 

Maintenance

To maintain the detector in good operating condition, perform the following basic maintenance as required.

1.        Calibrate and inspect the detector at regular intervals.

2.        Clean the exterior with a soft damp cloth. Do not use solvents, soaps, or polishes.

3.        Do not immerse the detector in liquids.


Hydrogen Sulfide Levels and Health Effects

Concentration   (PPM)

Short   Term Symptoms/Effects

0.00011-0.00033

Typical   background concentrations

0.01-1.5

Odor threshold   (when rotten egg smell is first noticeable to some.)

Odor becomes   more offensive at 3-5 ppm. Above 30 ppm, odor described as sweet or   sickeningly sweet.

2-5

Prolonged   exposure may cause nausea, tearing of eyes, headaches or loss of sleep.

Airway problems   (bronchial constriction) in some asthma patients.

20

Possible   fatigue, loss of appetite, headache, irritability, poor memory, dizziness.

50-100

Slight   conjunctivitis (eye irritation and redness).

Respiratory   tract irritation after 1 hour.

May cause   digestive upset or loss of appetite.

100

IDLH-   Immediately Dangerous to Life and Health

Leave area and   get to your safety zone

Coughing, eye   irritation, loss of sense of smell

Altered   breathing, drowsiness after 15-30 minutes

Throat   irritation after 1 hour

Gradual increase   in severity of symptoms over several hours

Death may occur after   48 hours.

200-300

Marked   conjunctivitis and respiratory tract irritation after 1 hour

Pulmonary edema   (fluid in lungs) may occur from prolonged exposure

500-700

Staggering,   collapse in 5 minutes. Serious damage to the eyes in 30 minutes

Death after   30-60 minutes.

700-1000

Rapid   unconsciousness, “knockdown” or immediate collapse within 1 to 2 breaths

Breathing stops.

Death within   minutes.

1000-2000

Nearly instant   death