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.
Specifications
| Measuring range | ± 500 Pa |
| Repeatability | ± 0.2 % FS |
| Resolution | 0.1 Pa |
| Sampling rate | 0.5 s |
| Operating temperature range | 0 °C ∼ 50 °C |
| Operational humidity | ˂ 85 RH |
| Display resolution | 320 x 240 |
| Power supply | 2400 mA Li-battery |
| Dimensions | 55 x 180 x 85 mm |
Features
Ultra-low power 32-bit microprocessor
2.6 inch IPS colour screen for differential pressure display
Multiple options of measurement units: Pa, mbar, etc.
Data storage function ( 16000 samples )
On site calibration through quick zero reset
Over-voltage and over-charge protection
Resistance to static and electromagnetic interference
Adjustable backlight display with automatic idle shutdown
Data export and easy data download to PC via USB line
Built-in battery
Applications
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.
Standard Accessories
| Accessory No | Accessory | Quantity |
| 1. | USB charger line | 1 |
| 2. | Data cable | 1 |
| 3. | Calibration certificate | 1 |
| 4. | Warranty card | 1 |
| 5. | User manual | 1 |
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| 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 |
| Precision | 3 to 10% F.S. |
| Response Time | ≤ 10 s |
| Repeatability | ≤ ± 1% |
| Zero Shift | ≤ ± 1%（F.S./year） |
| Display | LCD dot matrix display |
| Temperature | -20°C to 50°C |
| Humidity | 0 to 95 % RH |
| Degree of Protection | IP-66 |
| Alarm | Sound, light, vibration |
| Recovery Time | ≤ 10 s |
| Linearity Error | ≤ ± 1% |
| Gas Unit | Units are switchable |
| Battery | 3.6 V 2300 mAh lithium polymer rechargeable battery operate time is about 12 h continuously charging time: 4 to 6 h |
| Operating Time | 100 h (pump off) |
| Dimensions | 205×75×32 mm |
| Weight | 300 g |
| 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) |
| Display resolution | CO2：0.01 % and O2：0.1 % |
| Calibration | CO2：0.04 % revise the zero point outdoors, O2：20.9 % revise the zero point outdoors |
| Display | LCD display |
| Battery shelf life | About 20 hours (when using alkaline dry batteries) |
| Operation temperature | -10 to 50 °C |
| Operation humidity | < 90 % RH (non-condensation) |
| Power supply | #5 dry cell, 4/AC 100 to 250 V |
| Dimension Host Machine (W*D*H) | 76 × 27 × 145 mm |
| Dimension Detector (W*D*H) | 28 × 27 × 170 mm |
| Weight | About 250 g (includes detector, batteries) |
| HS Code | 9027100090 |
| Sampling Method | Diffusion |
| Working conditions | Temperature -20 to 50°C Pressure 0.9 to 1.1 (standard atmospheric pressure) Humidity 10 to 95 % RH (no dew condensation) |
| Explosion proof grade | Exia II CT3 |
| Protection grade | IP65 |
| Charging time | 4 to 6 h |
| Working time of battery | > 8 h (non-alarm state) |
| Type of battery | Lithium battery |
| Length of Pump pipe | < 1 meter |
| Measurement principle of sensor | Electrochemical, catalytic combustion |
| Power supply | Lithium battery (DC 3.7V, 2400mAh) |
| Dimension (host machine) | 85 × 153 × 50 mm |
| Dimension (hand shake of gas pump) | 45 × 239 × 28 mm |
| Weight (host machine) | About 300 g |
| Weight (hand shake of gas pump) | About 80 g |
| HS Code | 9027100090 |
| Measurement principle | Non-dispersive infrared (NDIR) |
| Gas Detected | SF6: 0 to 50 ppm range/ 0 to 1000 ppm range (as per req.) |
| Detection Uncertainty | |
| Detection Resolution | 0.1ppm |
| Sampling mode | Pumping type |
| Probe unit rod length | 22 cm |
| Response time | 1 to 5 s |
| Warm-up time | 100 s |
| Operation temperature | -10 to 60℃ |
| Display | OLED self-luminous with low power consumption, high brightness |
| Power supply | 4.2 V, internal lithium battery power supply, 2200 mAh |
| Shelf life | >10 years |
| Dimension | 500 × 290 × 180 mm |
| Weight | 0.7 kg |
| HS Code | 9027100090 |
| Measuring range | 0 ∼ 125 Pa |
| Accuracy | 0 ± 0.2 Pa (liner error) ± 1 % |
| Repeatability | |
| Resolution | |
| Sampling rate | |
| Operating temperature range | 0 °C ∼ 50 °C |
| Operational humidity | ˂ 85 RH |
| Display resolution | |
| Power supply | 7.4 V Li-battery |
| Dimensions | 212 x 92 x 32 mm |
| Weight | 0.36 kgs |
| Temperature Measurement Range | -10℃ to 60℃ |
| Temperature Resolution | 0.1°C |
| Temperature Accuracy | ± 1.5℃ |
| Relative Humidity Range | 20% to 80% RH |
| Relative Humidity Resolution | 0.1 % RH |
| Relative Humidity Accuracy | ± 3 % RH @25°C |
| Wind Velocity | 0.5 to 20 m/s, 1.8 to 72 km/h, 1.6 to 65.7 ft/s, 0.9 to 38.9 knots |
| Wind Resolution | 0.1 m/s, 0.1 km/h, 0.1 ft/s, 0.1 knots |
| Wind Accuracy | ± 3 % of reading + 10 digits |
| Air Velocity | 0 to 999900 CMM, 0 to 999900 CFM |
| Air Resolution | 0 to 999.9 m2, 0 to 999.9 ft2 |
| Air Accuracy | ± 3 % of reading + 10 digits |
| Sound (noise) Level | 30 to 130 dB (A), 35 to 130 dB (C) |
| Sound Level Resolution | 0.1 dB |
| Sound Level Accuracy | ± 1.5 dB |
| Test Condition | 94 dB, 4 kHz sine wave |
| Respond Frequency | 100 to 8000 kHz |
| Test Respond Time | About 2 time/second |
| Illuminance Range | 0 to 2000 Lux, X10 (20000), X100 (50000) |
| Illuminance Resolution | 1 Lux, 10 Lux, 100 Lux |
| Illuminance Accuracy | ± 5 % of reading + 10 digits at color temperature 2850 K calibrated to standard incandescent lamp at color temperature 2856 K |
| Display | LCD (backlight screen) |
| Power Supply | 6F22 (9V) |
| Auto off- Power Cut Off | Yes |
| Dimension (L×W×H) | 280×89×50 mm |
| Weight | 430 g |
| Capacity | 50 kg |
| Accuracy | 1 g |
| Speed | 1 s |
| Value stable time | 2 s |
| Display | LCD screen display |
| Pan type | Square |
| Weighing units | kg, g, oz, lb |
| Functions | Counting, percentage, full range tare, animal weighing function, zero tracking |
| Overload protection | Yes |
| Indicator | Low battery |
| Sensor | Aluminum sensor |
| Pan to floor height | 120 mm |
| Material | 304 Stainless steel Iron, ABS house |
| Power | AC |
| Pan dimensions (L×B) | 400×500 mm |
| Indicator dimensions (L×H) | 250×150 mm |
| Packaging dimensions (W×D×H) | 490×450×170 mm |
| Net weight | 6 kg |
| Gross weight | 7 kg |
