Block digester for 6 tubes of 42 mm diameter. Uniform warming. Composed by a programmer for time/temperature RAT-2 (45 to 450ºC) with memory for 20 programs of 4 steps (tmax/step 600mins), two gradients of Temperature (Kjeldahl/D. Q. O), alarm, break sensor, acoustic indication and the end of program, RS-232 output. Includes rack with support tube of stainless steel. Includes manual.