Portable Gases detector MHK-OCZ5
Portable Gases detector MHK-OCZ5
Portable Gases detector MHK-OCZ5
MHK-OCZ5 is a precise portable gases detector for monitoring oxygen (O2), carbon dioxide (CO2), low level ozone (O3) concentration, temperature and relative humidity in the ambient air. The MHK-OCZ5 will continuously display the ambient concentration of oxygen, carbon dioxide, ozone and activate its audible and visual alarms whenever the preset set points are exceeded.
Features
Portable O2, CO2 and O3 Gases detector
O2 range: 0 ~ 30.0% vol. Resolution: 0.1% vol.
CO2 range: 0~9,999 PPM display. Resolution: 1 PPM
Low level O3 gas detector range: 0 ~ 5.000 PPM. Resolution: 0.001 PPM or 1.0 PPP
Using world top brand electrochemical oxygen sensor
Stable and accurate NDIR sensor for CO2 detection
Support ambient fresh air calibration (20.9% vol. O2 and 400 PPM CO2)
Audible and visual alarm
Two levels of instantaneous alarm
With temperature and humidity measurement
Device
1. TFT display
2. Power button
3. Select button
4. Enter button
5. Air sampling ports
6. Battery compartment cover
Alarm
Low Alarm and High Alarm
MHK-OCZ5 has two alarm set points: Warning (either O2: 23.5% or 5000ppm CO2 or 0.5ppm O3) and Danger (either O2: 19.5% or 9999ppm CO2 or 1.0ppm O3). These set points are factory set and cannot be changed. MHK-OCZ5 is equipped with audio and visual alarms to alert user when the ambient gas concentration exceeds one of the two alarm set points. When one gas value reaches the defined danger alarm set point, the audio alarm will sound at 3 beeps/sec. When one gas value exceeds the defined warning alarm set point, the audio alarm will sound at 2 beeps/sec.
Factory Alarm Set points
Gas | Low | High |
O2 | 19.5% vol. | 23.5% vol. |
CO2 | 5000ppm | 9999ppm |
O3 | 1.0ppm | 0.5ppm |
Specifications
Oxygen Sensor Specification:
Sensor | Electrochemical sensor |
O2 Measurement Range | 0 ~ 30.0% vol. O2 |
O2 Resolution | 0.1% vol. |
Sample Method | Diffusion |
Temperature Range | -20 to 50°C (-4°F ~ 122°F) |
Humidity Range | 5 to 95%RH |
O2 baseline Drift (-10-50°C) | <1% change in output @ 3 months |
O2 response time | <15 seconds from 20.9% to 0% O2 |
O2 Measurement Interval | 2 seconds |
CO2 Specification:
Sensor | Dual Beam Non-dispersive Infrared (NDIR) sensor |
CO2 Measurement Range | 0~9,999ppm display |
CO2 Resolution | 1ppm / 0.01% |
CO2 Accuracy | ±40ppm or ±3% of reading |
Repeatability | ±20ppm @ 400ppm |
Sample Method | Diffusion |
Temperature Dependence | Typ. ±0.3% of reading per °C or ±4ppm per °C, whichever is greater, referenced to 25°C |
Pressure Dependence | 0.13% of reading per mmHg |
CO2 Response Time | About 2 min for 90% of step change |
CO2 Warm-up Time | <5 seconds at 22°C |
CO2 Measurement Interval | 2 seconds |
O3 Sensor Specification:
Sensor | Electrochemical sensor |
Measurement Range | 0~5.000 PPM |
Resolution | 0.001 PPM / 1.0 PPP |
Repeatability | <±5% of signal |
Sample Method | Diffusion |
Accuracy | ±5%FS |
Warm-up time | <3 mins |
Response time | < 90 seconds (diffusion) |
Recovery time | < 90 seconds (diffusion) |
Service life | 2 years (in air) |
O3 Measurement Interval | 2 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
Display | 2.2" TFT LCD |
Operating | -10°C to 50°C (14°F to 122°F), 15~90% RH non-condensing |
Storage | -10°C to 60°C (14°F to 140°F), <99% RH non-condensing |
Power Supply | Three AA Alkaline Batteries |
Dimensions | 74x148x26.5mm (2.91x5.83x1.04") |
Weight | 145 grams (5.11 oz.) without batteries |