Analysis chamber for ventilation and air conditioning ducts. Venturi tube operating principle, sampling mode, single tube with double duct for air intake and discharge. The analysis chamber is equipped with TFBASE01 connection base, for TFDA-S2 optical smoke detector. Protection rating IP54. ABS casing. Grey color. Dimensions (L x H x D) 165 x 279 x 83mm. The device must be equipped with: TFDA-S2 detector and sampling tube of appropriate length. Approved EN 54-27.