Portable Gas Monitor

04 series



・Single-component portable gas monitor with long
 continuous operating time
・Incorporates durable new R sensor with advanced functions
・Three-year sensor warranty

Sampling method

Diffusion type

Principle of detection

Potentiostatic Electrolysis Method

Detection range

SO2:0.00 to 20.00 ppm(Display range 0.00 to 100.00 ppm)
NO2:0.00 to 20.00 ppm
HCN:0.0 to 30.0 ppm

Alarm setpoints

Depend on target gas.

Type of alarm

Gas alarm / fault alarm

Display of alarm

Flashing lamp / intermittent buzzer sounding / gas concentration display blinking / vibration

Explosion protected construction

Intrinsic safety

Explosion-proof class

IECEx : Ex ia ⅡC T4 Ga (AAA alkaline), Ex ia ⅡC T3 Ga (Ni-MH)
ATEX : Ⅱ1G Ex ia ⅡC T4 Ga (AAA alkaline), Ⅱ1G Ex ia ⅡC T3 Ga (Ni-MH)

Ingress proof rating

IP66/67 equivalent


Japan Ex, ATEX, IECEx, Brazil Ex

CE marking


Power source

AAA alkaline or Ni-MH (eneloop) batteries (x2)

Continuous operation

Approx. 3000 hours (AAA alkaline)
Approx. 2000 hours (Ni-MH)


Approx. 54 (W) x 67 (H) x 24 (D) mm (excluding projections)


Approx. 93g

Operating temperature range

-40℃ to +60℃ [SO2,NO2](no sudden changes)
-20℃ to +60℃ [HCN](no sudden changes)
(Approx. 15-minute temporary use environment: -20℃ to +50℃[no sudden changes])

Operating humidity range

0 to 95%RH (no condensation)
(Approx. 15-minute temporary use environment: 10 to 90%RH[no condensation])

Operating pressure range

80 to 120 kPa (80 to 110 kPa for explosion-proof range)