Gas sensor:solid semi-conductor gas sensordetecting gas:natural gas,ammonia,hydrogen,coal gas,lpg acetone,ethanol oxide,h2s lacquer,diluent,industrial inpregnant,alcohol,gas fuel etcgas sensitivity:Po

Features:The detector is used to discriminate ferrous and nonferrous metalobjects, and detect metallic minerals.

Features:1) Auto tune2) Meter indication for metal being detected3) Three-tone discrimination for different4) Types of metal5) DISC and ground balance adjustment6) Variable shaft length and arm suppor

Product Name: Personal Alcohol Breath Analyzer with 5 Step DisplayModel Number: 219-158Place of Origin: ChinaSpecifications:1) Advanced hot-wire microchip alcohol sensor2) Efficient range: 0.01 to 0.1

Power: one 9v alkaline batteryoperating frequency:50khz+-10%(sine wave)sensitivity:>=5cmindication:audio alert and led (red)alert.audio tone changes as the metal size changessilent operation: connect

Power: one 9v alkaline batteryoperating frequency:50khz+-10%(sine wave)sensitivity:>=5cmindication:audio alert and led (red)alert.audio tone changes as the metal size changessilent operation: connect

Product Name: Ultrasonic Distance MeasurerModel Number: 219-016Place of Origin: ChinaSpecifications:1) Range: 0.61 - 12m (2 - 40ft)2) Accuracy: +/-0.5%+/-1 digit3) Power: 1 x 9V4) Auto power off5) G/B

Product Name: Ultrasonic Distance MeasurerModel Number: 3004Place of Origin: ChinaSpecifications:1) Range: 0.61 - 12m (2 - 40ft)2) Accuracy: +/-0.5%+/-1 digit3) Power: 1 x 9V4) Auto power off5) G/B di

Product Name: Ultrasonic Distance Measurer with CalculatorModel Number: 219-015Place of Origin: ChinaSpecifications:1) Range from 3ft -60ft (0.9m - 18.30m)2) Auto meter or feet conversion3) Three memo