... Temperature Data LoggerFeatures:1. Input channel, 1,2,3,4,6,8 channel for option.2. Channel Isolation between each channel,no interference3. Display, 6 ... ,range:10 mm/h~990mm/h10. Alarm, 6 relay output for option Relay contact capacity, 24VDC, 3A; 220VAC, 3A 11.Communication ... Hz 21. Panel size, 144×144×200 mm 22. Size for holing, 138+1 × 138+1 mm. ..