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Digital differential pressure meter LDPM-A20 is an advanced microprocessor based handheld unit. It is developed for the determination of pressure difference and can measure positive as well as negative pressures. Fabricated using new semiconductor based nm process, it provides stable and precise readings for different levels in and out of clean rooms.
Used in differential pressure measurement of clean rooms, air conditioning ducts, pneumatic, compressor and pump installations, valves, tanks and heating, ventilation and air conditioning (HVAC) systems, departments such as electronics, pharmaceuticals and biotechnology; monitoring of filters, etc.
| Measuring range | 0 ∼ 125 Pa |
| Accuracy | 0 ± 0.2 Pa (liner error) ± 1 % |
| Operating temperature range | 0 °C ∼ 50 °C |
| Operational humidity | ˂ 85 RH |
| Sampling | With internal sampling pump, flow rate is up to 1 L/min, ten grades of pumping suction for selection |
| Gas | Ethylene C2H4 |
| Measure Range | 0 to 1000 ppm |
| Resolution | 1ppm |
| Sampling method | Diffusion |
| Sensor type | CO2: solid electrolyte sensor, O2：electrochemical sensor |
| Detection range | CO2：0.04 to 5.00 % and O2：0.0 to 30.0 % |
| Detection accuracy | CO2：± 30 % rdg (rdg = reading) and O2：± 3 % F.S. (F.S. = full scale) |
| Sampling Method | Diffusion | ||||||
| Working conditions |
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| Explosion proof grade | Exia II CT3 | ||||||
| Protection grade | IP65 |
| Measurement principle | Non-dispersive infrared (NDIR) |
| Gas Detected | SF6: 0 to 50 ppm range/ 0 to 1000 ppm range (as per req.) |
| Detection Uncertainty | <1.5 % F.S |
| Detection Resolution | 0.1ppm |
| Gas detected | NO2 |
| Detection principle | Electrochemistry |
| Sampling method | Pumping suction, flow rate can up to 1L/min, ten grades of pumping suction for selection. |
| Measure range | 0 to1000 ppm |
| Gas detected | Sulfur dioxide SO2 |
| Detection principle | Electrochemistry |
| Sampling method | Pumping suction, flow rate can up to 1L/min, ten grades of pumping suction for selection. |
| Measure range | 0 to1000 ppm |
| Sampling method | Diffusion | ||||
| Measurement principle | Electrochemical (oxygen, toxic gases), Catalytic combustion (flammable gases), Infrared principle (carbon dioxide gas) | ||||
| Detector gas | Flammable gases, oxygen gas, toxic and harmful gases | ||||
| Response time |
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| Gas Detected | O2 CH4 CO2 VOC CO H2S SO2 CL2 NO2 NH3 |
| Detection principle | Electrochemical principle (O2 CO H2S SO2 CL2 NO2 NH3) Infrared principle (CH4 CO) Photoionization principles (VOC) |
| Measurement Range | O2: 0-30% VOL, CH4: 0-50000 PPM, CO2:0-50000 PPM VOC:0-2000 PPM, CO:0-999 PPM, H2S: 0-200 PPM SO2: 0-25 PPM, CL2: 0-50 PPM, NO2: 0-100 PPM, NH3:0-100 PPM |
| Resolution | O2: 0.01% VOL, CH4: 1 PPM, CO2:1 PPM VOC:1 PPM, CO:0.1 PPM, H2S: 0.1 PPM SO2: 0.01 PPM, CL2: 0.01 PPM, NO2: 0.01 PPM, NH3:0.01 PPM |
| Gas Detected | Nitrogen N2 |
| Detection principle | Electrochemical principles |
| Measurement Range | 0 to 100 %.Vol |
| Resolution | 0.01 %VOL |
| Measurement range | 0 ppm ∼ 5 ppm |
| Resolution | 0.001 ppm ( 0 ppm ∼ 5 ppm ) |
| Temperature range | ˗ 40 °C ∼ 120 °C |
| Humidity range | 0 % ∼ 100 % RH |
| Ozone measurement range | 0 ppm ∼ 5 ppm, 0 ppm ∼ 100 ppm, 0 ppm ∼ 300 ppm, 0 ppm ∼ 600 ppm ( Optional ) |
| Flow rate | 1.5 L/min |
| Accuracy | 0.01 ppm or 3 % of reading |
| Resolution | 0.001 ppm |
| Ozone measurement range | 0 ppm ∼ 100 ppm/ 0 ppm ∼ 1000 ppm |
| Flow rate | 1 L/min |
| Accuracy | 0.01 ppm |
| Measuring time | 10 seconds |
| Temperature Measurement Range | -10℃ to 60℃ |
| Temperature Resolution | 0.1°C |
| Temperature Accuracy | ± 1.5℃ |
| Relative Humidity Range | 20% to 80% RH |
