Sound Level Meter, Light Meter, Humidity Meter and Temperature Meter - all in one! The HT-8820 4-in-1 Digital Multi Function Environment Meter has been designed to combine the functions of Sound Level Meter, Light Meter, Humidity Meter and Temperature Meter. It is an ideal Multi-Function Environment Meter Instrument with scores of practical applications for professional and home use.

The Sound Level function can be used to measure noise in factories, schools, offices, airports, home, etc., checking acoustics of studios, auditoriums and hi-fi installations. The Light function is used to measure illuminance in the field. It is fully cosine corrected for the angular incidence of light. The light sensitive component used in the meter is a very stable, long life silicon diode.

The Humidity/Temperature is for use with a humidity/semiconductor sensor and K type thermocouple.

Supplied with carry case and 9V battery.

Features

• 4 functions measure Sound level, Light, Humidity and Temperature
• 3 1/2 large LCD display with units of Lux, ºC,%RH and C & dB, A & dB indication
• Easy to use
• Light measuring levers ranging from 0.01 lux to 20,000 lux.
• Sound level range: A LO (low) - Weighting: 35-100 dB, A HI (High) - Weighting: 65-130 dB, C LO (low) - Weighting: 35-100 dB, C HI (High) - Weighting: 65-130 dB
• Resolution: 0.1 dB
• Humidity measurement from 25%RH to 95%RH with 0.1%RH resolution and fast time response
• Temperature measuring levers ranging from – 20.0ºC~+750ºC/-4ºF~+1400ºF

Specification

• Display: Large 1999 counts LCD display with function of Lux , x10 Lux, ºC, ºF, %RH and dB, A & dB ,C & dB, Lo & dB, Hi & dB, MAX HOLD, DATA HOLD indication
• Polarity: Automatic, (-) negative polarity indication
• Over-Range: OL mark indication
• Low Battery Indication: BAT is displayed when the battery voltage drops below the operating level
• Measurement Rate: 1.5 times per second, nominal
• Storage Temperature: -10ºC to 60ºC(14ºF to 140ºF) at < 80% relative humidity
• Auto Power Off: Meter automatically shuts down after approx.10 minutes of inactivity
• Power: 1 x 9V battery (supplied)
• Dimensions: 251(H) x 63.8 (W) x 40mm (D)
• Weight: 250g

Sound Level

• Measurement Range: A LO (low) - Weighting: 35-100 dB, A HI (High) - Weighting: 65-130 dB, C LO (low) - Weighting: 35-100 dB, C HI (High) - Weighting: 65-130 dB
• Resolution: 0.1 dB
• Typical Instrument Frequency Range: 30Hz-10KHz
• Frequency Weighting: A, C - weighting
• Accuracy: ±3.5 dB at 94 dB sound level, 1KHZ sine wave

Light

• Measuring Range: 20, 200, 2000, 20,000 lux (20,000 lux range reading x10)
• Accuracy: ±5% rdg +10 dgts
• Repeatability: ±2%.

Humidity/Temperature

• Measurement Range: Humidity 25%~95%RH
• Temperature: -20.0ºC~+50.0ºC -4ºF~+122ºF (K-type) -20.0ºC~+200.0ºC -20ºC~+750ºC;
-4.0ºF~+200ºF, -4ºF~+1400ºF
• Resolution: 0.1%RH, 0.1ºC, 1ºC/0.1ºF, 1ºF.
• Humidity: ±5%RH (at 25ºC, 35%~95%RH)
• Humidity Sensor Response T: approx. 6min.
• Temperature:
  • ±3%rdg±2ºC(at-20.0ºC~+200.0ºC)
  • ±3.5%rdg±2ºC(at-20.0ºC~+750ºC)
  • ±3%rdg±2ºF(at-4.0ºF~ +200.0ºF)
  • ±3.5%rdg±2ºF(at-4ºF~+1400ºF)
• Input Protection: 60V dc or 24V ac rms.  

Related Product(s)

(HM-8000) 4-in-1 Environmental Meter

(HM-2000) 3-in-1 Temperature Meter

(HT-625) Temperature and Humidity Meter (with Carry Case)