EST-301-H2S hydrogen sulfide detector

EST-301-H2S hydrogen sulfide detector is a fixed gas concentration measuring instrument, adopts electrochemical sensor and high-precision circuit design, responds quickly and accurately, and is suitable for long-term measurement.
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Description
EST-301-H2S hydrogen sulfide detector
EST-301-H2S hydrogen sulfide detector is a fixed gas concentration measuring instrument, adopts electrochemical sensor and high-precision circuit design, responds quickly and accurately, and is suitable for long-term measurement.

EST-301-H2S hydrogen sulfide detector is designed and produced in accordance with relevant national standards:
GB/T18883-2002 "Indoor Air Quality Standard" GB3095-1996 "Ambient Air Quality Standard"
GB50325-2010 "Code for Indoor Environmental Pollution Control of Civil Construction Engineering"
GB50325-2001 Indoor Environment Pollution Control Code for Civil Construction Engineering
GB12358-2006 "General Technical Requirements for Ambient Gas Detection and Alarm in Workplaces" Industrial Standard
EU Directive 2002/231/CE Taiwan "Indoor Air Quality" standard
EMC electromagnetic compatibility related test standards, European standard EN55022,

EST-301-H2S hydrogen sulfide detector is mainly used for:
Gas storage leakage monitoring
Natural gas and liquefied gas application sites
Coal mine
Petrochemical
Indoor Air Quality Testing Agency

Features of EST-301 gas detector:
Chinese and English menu design
The explosion-proof safety cavity design meets IEC60079 electrical explosion-proof requirements; the aluminum explosion-proof enclosure has good sealing, anti-corrosion, long life, low temperature resistance, resistance to sulfide, silane gas poisoning; suitable for offshore platforms, and high temperature, Use in various harsh environments such as high humidity.
Using advanced imported sensors, high precision, high service life, repeatability and stability.
Automatically identify sensor probes, you can use sensor probes of different gas types; after replacing the sensor probe, the program automatically recognizes and obtains gas type, range, low point alarm value, high point alarm value and other parameters.
LCD with backlight, concentration value displayed on site, on-site and remote setting maintenance does not affect the control unit; the non-contact method of magnetic induction completes the calibration and parameter setting.
Four extra-high-bright LED lights indicate power supply, low and high alarms and function prompts respectively. The low limit and high limit alarm action values ​​can be programmed and set; at the same time, the sound alarm will sound an alarm and inform the on-site staff as soon as possible.
At the same time, it has digital and analog signal output. The analog signal is a standard three-wire 4-20mA current signal; the digital signal is RS485, which can be very convenient to communicate with the host computer.
A password to enter the menu can be set to prevent other personnel from operating and changing parameters at will, which is safe and reliable.
 
Model Gas type Standard range display resolution Sensitivity Precision Response time
T90
EST-301-H2S Hydrogen sulfide 0-20/100ppm 0.01/0.1 0.1ppm ±5%F.S. <40S
Sensitivity is the lowest test concentration of the instrument, the above is the measurement range of conventional gas concentration, and other ranges can be customized

Electrical performance of EST-301 gas detector
1. Working voltage: 12-30VDC
2. Working current: 20-30mA (static)
3. Display mode: 4-digit LCD display with backlight
4. Display unit: PPM
8. Test object: carbon dioxide
9. Detection principle: non-scattering infrared
10. Detection method: diffusion
11. Response time: 60s
12. Alarm value: settable (0 means cancel the alarm)
13. Alarm mode: two-level sound and light alarm (external sound alarm, optional)
14. Alarm error: ≤±5% alarm setting value
15. Contact capacity output: 10A 250VAC
16. Repeatability: ≤2%;
17. Stability: ≤±2%F.S/6h (zero point), ≤±5%F.S/6h (gain)
18. Working temperature: -10℃~+40℃
19. Relative humidity: ≤ 95%RH without freezing
20. Atmospheric pressure: ±10% atm
21. Signal output: three-wire 4-20mA (analog) and RS485 (digital)
22. Transmission distance: ≤100m (4-20mA), ≤1000m (RS485)
23. Explosion-proof grade: Ex d IIC T6
24. Protection level: IP65
25. Wiring mode: M20*1.5 internal thread
26. Installation method: wall-mounted
27. Shell material: aluminum explosion-proof shell (main shell), stainless steel (accessory)
28. Machine size: 226*177*92mm
29. Whole machine weight: about 1.5 kg
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