Series 157 recorders provide a wide choice of input voltages for greater flexibility. 25% wider chart width allows small fluctuations near the baseline to be more clearly seen. Chart speeds of up to 30 cm per minute take advantage of the Series 157's fast response time. A remote on/off facility allows easy automation through banana jack connections. Zero controls are adjustable to twice the input range. Operating ambient temperature range: 41°F to 104°F (5°C to 40°C); 35% to 80% relative humidity, non-condensing. Applications include: use with thermocouples (1 or 10 mV range), monitor oven or incubator stabilities or QC monitoring of industrial process signals. Chart paper and pens included. Shipping weight: 12 Lbs. Specifications: Input Range: 1,2,5,10,50,100,500mV & 1,2,5V, Input Impedance: 2.5 MO, Chart Speeds (cm/min or hr): 1,2,3,4,5,6,10,12,15,20,30, Accuracy: < ± 1% overall limit of error, Response Time: 50 cm/sec.