Type:ACO2-2 1.Method of measurement: Importing IR sensor 2.Voltage: 12~36VDC, 19VDC~29VDC 3.Detection range: 0~10% vol,20%,50%, 100% 4.Distinguishability: 1ppm 5.Accuracy:-3%~+3% 6.Recovering time:<=60s 7.Response time: <=30s 8.Displayer: Optional 9.Max transimitting disctance:1100m, 2.5square mm cooper wire 10.Long term null drift: 1%/month 11.Working temperature: -20 ~60 Centigrade 12.Storage temperature:-40~85 Centigrade 13.Output Signal: Digital: RS232(Optional), 2 loops TTL electrical level analog signal: 4~ 20ma 14.Safey level: ExdII CT6(explosion-proof type) 15.Work life: >10years