Description

INTRODUCTION CEM DT-8820 4 in 1 Multifunction Environment Meter

The CEM DT-8820 4 in 1 Multifunction Environment Meter gives engineers, safety officers, HVAC technicians, and quality inspectors a single handheld solution for four critical environmental parameters. This professional instrument measures illuminance (Lux/FC), sound pressure level (dB), ambient temperature (°C/°F), and relative humidity (%RH) CEM DT-8820 4 in 1 Multifunction Environment Meter

SPECIFICATIONS CEM DT-8820 4 in 1 Multifunction Environment Meter

Parameter	Illuminance (Light Intensity)
Range	0–2,000 Lux / 0–20,000 Lux / 0–200,000 Lux (Auto / Manual)
Unit	Lux (Lx) and Foot-Candle (FC)
Resolution	0.1 Lux (low range)
Accuracy	±3% rdg ±10 d (Lux); ±4% rdg ±10 d (FC)
Spectral Response	CIE spectral luminous efficiency function V(λ)
Sensor	Silicon photodiode with colour-correction filter

Parameter	Sound Pressure Level
Range	30–130 dB
Resolution	0.1 dB
Accuracy	±1.5 dB (at 1 kHz)
Frequency Weighting	A-weighting
Time Weighting	Fast (125 ms)
Microphone	Electret condenser microphone

Parameter	Ambient Temperature
Range (°C)	-10°C to 50°C
Range (°F)	14°F to 122°F
Resolution	0.1°C / 0.1°F
Accuracy	±1°C (±1.8°F)
Sensor	NTC thermistor

Parameter	Relative Humidity
Range	10% RH to 95% RH
Resolution	0.1% RH
Accuracy	±3% RH (at 25°C, 40–80% RH)
Sensor	Capacitive humidity sensor

Display	Large LCD with backlight
Power Supply	9V battery (6F22 type) × 1
Battery Life	Approximately 50 hours (alkaline battery)
Auto Power-Off	Yes (approx. 15 minutes after last key press)
Data Hold	Yes
MAX / MIN Function	Yes
Operating Temperature	0°C to 40°C (32°F to 104°F)
Storage Temperature	-10°C to 60°C (14°F to 140°F)
Operating Humidity	≤80% RH (non-condensing)
Dimensions	Approx. 64 × 155 × 33 mm
Weight	Approx. 175 g (including battery)
Brand	CEM Instruments
Model	DT-8820
Category	Multifunction Environment Meter
Country of Origin	China
Warranty	1 Year Manufacturer Warranty

 

KEY FEATUR CEM DT-8820 4 in 1 Multifunction Environment Meter

• Measures four environmental parameters: illuminance, sound, temperature, and humidity from a single unit
• Wide Lux range from 0 to 200,000 Lux with selectable Lux and Foot-Candle (FC) display
• Sound level range from 30 dB to 130 dB with A-weighting frequency response
• Temperature measurement from -10°C to 50°C (14°F to 122°F) with switchable °C/°F readout
• Humidity measurement from 10% RH to 95% RH with ±3% RH accuracy CEM DT-8820 4 in 1 Multifunction Environment Meter
• Large, easy-to-read LCD display presents all readings clearly in any lighting condition
• Data-hold function freezes the current reading for convenient recording
• MAX/MIN function captures the maximum and minimum values during a measurement session
• Rotary mode selector lets users switch between measurement functions instantly
• Auto power-off extends battery life and prevents unnecessary drain during storage CEM DT-8820 4 in 1 Multifunction Environment Meter
• Compact and lightweight design allows easy one-hand operation and carrying to field sites
• Built-in light sensor, microphone port, and NTC temperature/humidity probe cover all four parameters
• Low battery indicator alerts the user before the battery affects measurement accuracy

 

APPLICATIONS

Workplace Safety & Ergonomics

• Verifying office and factory lighting levels against Bangladesh Labour Act and ISO 9241 standards
• Checking noise exposure in manufacturing floors, workshops, and construction sites
• Monitoring temperature and humidity in employee workspaces to maintain comfort and productivity

HVAC & Building Management

• Measuring indoor air temperature and humidity to optimise HVAC system performance
• Diagnosing hot or cold spots inside data centres, server rooms, and cold-storage facilities
• Confirming ventilation effectiveness in commercial buildings and hotels

Laboratory & Research

• Recording ambient conditions for sample storage, chemical reactions, and calibration procedures
• Cross-checking environmental parameters during quality control audits
• Supporting environmental impact assessments in industrial research projects

Education & Training

• Demonstrating environmental measurement principles in engineering and science classrooms
• Conducting student lab experiments that require light, sound, temperature, and humidity data

Photography & Film

• Measuring available light levels in Lux or Foot-Candles for studio and location lighting setup
• Monitoring temperature and humidity in film archives and photographic print storage rooms

WHO USES THIS CEM DT-8820 4 in 1 Multifunction Environment Meter

• Environmental health and safety (EHS) officers conducting workplace compliance checks
• HVAC engineers and building facility managers maintaining indoor climate control
• Factory and production supervisors monitoring production floor conditions
• Laboratory technicians and quality control analysts recording ambient test conditions
• School and university science departments running environmental measurement experiments
• Photographers and videographers setting up accurate lighting for shoots
• IT and data centre managers monitoring server room temperature and humidity
• Agriculture professionals measuring greenhouse light intensity and humidity for crop growth
• Construction and civil engineers performing site environment assessments
• Research institutes and government bodies conducting environmental surveys in Bangladesh

 

FREQUENTLY ASKED QUESTIONS

Q: Does the CEM DT-8820 measure all four parameters simultaneously?

A: The DT-8820 uses a rotary selector dial to switch between the four measurement modes — light, sound, temperature, and humidity. The user selects one mode at a time. This design keeps the display uncluttered and the readings accurate for each parameter.

Q: What battery does the CEM DT-8820 use, and how long does it last?

A: The meter operates on a single 9V (6F22) battery. Under normal use with an alkaline battery, expect approximately 50 hours of operation. The auto power-off feature activates after about 15 minutes of inactivity to conserve battery life CEM DT-8820 4 in 1 Multifunction Environment Meter

Q: Can the DT-8820 measure light in Foot-Candles (FC) as well as Lux?

A: Yes. The light measurement function supports both Lux (Lx) and Foot-Candle (FC) units. Users can switch between units using the designated function button, making the meter compatible with both international (SI) and US lighting standards CEM DT-8820 4 in 1 Multifunction Environment Meter

Q: Is the CEM DT-8820 suitable for noise measurement compliance in Bangladeshi factories?

A: Yes. The DT-8820 measures sound levels from 30 dB to 130 dB with A-weighting, which is the standard frequency weighting for occupational noise assessments. This makes it suitable for initial noise screening in factories, workshops, and construction sites in Bangladesh CEM DT-8820 4 in 1 Multifunction Environment Meter

Q: Does ASTZBD offer warranty and after-sales support in Bangladesh?

A: Yes. ASTZBD provides a 1-year manufacturer warranty on the CEM DT-8820 along with dedicated after-sales support for buyers across Bangladesh. Contact ASTZBD directly through the website for servicing, calibration queries, and spare parts CEM DT-8820 4 in 1 Multifunction Environment Meter

Q: What is the accuracy of the temperature and humidity sensors?

A: The temperature sensor achieves ±1°C accuracy, and the humidity sensor achieves ±3% RH accuracy at 25°C within the 40–80% RH range. Both readings are suitable for workplace monitoring and HVAC commissioning tasks.

Q: Does the meter have data logging or PC connectivity?

A: The DT-8820 features a data-hold function and MAX/MIN recording for capturing peak and minimum values during a session. It does not include built-in data logging or direct PC connectivity. For advanced logging needs, consider pairing it with a separate data logger.

WHY BUY FROM ASTZBD CEM DT-8820 4 in 1 Multifunction Environment Meter

• ASTZBD is Bangladesh’s trusted source for professional measurement instruments, tools, and testing equipment.
• Every product ASTZBD sells comes with verified authenticity — no counterfeit or grey-market units enter the inventory.
• ASTZBD provides fast delivery across Bangladesh, including Dhaka, Chittagong, Sylhet, Rajshahi, and all major cities.
• The ASTZBD customer service team speaks Bengali and English, providing pre-sales consultation and post-purchase support in the language buyers prefer.
• ASTZBD offers a 1-year warranty on the CEM DT-8820 and handles any warranty claims directly so buyers do not need to contact overseas manufacturers.
• ASTZBD stocks genuine calibration certificates and product manuals in both English and localised formats for buyers who need documentation for compliance purposes.
• Competitive pricing, flexible payment options, and corporate invoicing make ASTZBD the preferred supplier for institutions, businesses, and individual professionals in Bangladesh.