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EXTECH INSTRUMENTS
8
FM300-en-GB_V1.9 3/17
Specifications
Measurements
HCHO (CH
2
O) ppm, Temperature, RH%
HCHO range and resolution
Measurement range 0.00 to 5.00ppm (0.01ppm)
HCHO Sensor
Electrochemical type
HCHO Accuracy *
±25% + 0.03 ppm
Alarm alert
Visual LED alarm and audible beeper alarm
Temp. range and resolution
0 to 50
o
C (32 to 122
o
F); 0.1
o
C (0.1
o
F)
RH% range and resolution
10 to 90 %RH (0.1%)
Temperature and RH% Accuracy
±1
o
C (2
o
F) Temperature; ±5% RH
Date and Time indicators
Year, Month, Day, and Time (HR:MIN:SEC)
Response time
< 30 seconds
Internal Memory
99 data point (01-99) store/recall/clear
MAX/MIN Record / Recall / Clear
Stores highest reading since power start
Measurement analysis
TWA/STEL modes
Power
Universal AC adaptor (for 100 to 240VAC sources)
Dimensions
155 x 87 x 81mm (6.1 x 3.4 x 3.2”)
Weight
165 g (5.8 oz.)
*Accuracy Note: Accuracy meets NIOSH acceptance criterion within ±25% of the true value at
95% confidence level
Sensor Cross Sensitivity table
Substance
Cross Sensitivity (%)
CO
1
H2S
No Data
H2
0.1
SO2
12
NO2
No Data
NO
No Data
CL2
-3
C2H4
No Data
NH3
0.0
CO2
0.0
Ethanol, methanol
50
Phenol
7
Water Vapor
0.0*
*NB: Within specified range. Step changes in %RH produce short term transient response
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