HABOTEST HT66 Mini Gas Detector Household Handheld Combustible Gas Detecting Gauge with Long Probe Gas Leak Monitor Tester PPM Meter Methane Concentration Alarm Instrument ( Item#: E21512 )

Features:
Compact Structure & Super Light Weight: portable to use and store, providing you a better using experience.
High Precision & Fast Response: adopts gas-sensitive semi-conductor sensor for fast detecting and has wide reaction range(50~1000ppm).
6.6-inch Long Probe: the long probe allows you to freely detecting in a narrow place.
Visible & Audible Dual-way Alarm: when combustible gas leakage is detected, the buzzer will sound and the concentration indicator will be on.
Low Power Consumption: powered by 2pcs AAA batteries (NOT included), with low battery indication, long standby and easy for replacement.
Auto Power Off: when no concentration is measured within 5 minutes, the meter will automatic shutdown. One button to power on-off manually.

Specifications:
Material: ABS
Sensor: Gas-sensitive semi-conductor
Reaction Range: 50~1000PPM (methane)
Reaction Sensitivity: Approx. <50ppm (methane)
Warm-up Time: Approx. 30s
Reaction Time: ≤500ppm: Approx. 5s, >500ppm: Approx. 2s
Alarm Mode: Visible and audible
Operating Condition: 0~50℃, 20~80%RH
Storage Condition: -10~60℃, 20~80%RH
Power Supply: 2 * 1.5V AAA battery (NOT included)
Item Size: 330 * 40 * 26mm / 12.99 * 1.57 * 1.02in
Item Weight: 52g / 1.85oz
Package Weight: 93g / 3.29oz
Package Size: 34 * 5.5 * 3.5cm / 13.59 * 2.17 * 1.38in

Packing List:
1 * Gas Detector
1 * Manual (English)