67     Individual-room control systems, VAV       67.002 TS . P 80 & TS . P 81 Pneumatic room-temperature controllers 67.004 TK . P 80 & TK . P 81 Pneumatic duct-temperature controllers 67.100 RXP 81 Pneumatic master controller 67.301 RLP 10 & 20 Pneumatic volume-flow controller 67.320 RLP 10 F902 Pneumatic volume-flow transducer 67.400 RLP 100 Pneumatic air-volume controller 67.420 RLP 100 F901, F915 & F924 Pneumatic room-pressure controller 67.430 RLP 100 F903 & F908 Pneumatic volume-flow transducer 67.440 RLP 100 F916, F918, F910 Dual-channel air-volume controller 67.500 RXP 101 Air-volume adding relay 67.520 TUP 224 F901 Pneumatic sash sensor 67.525 RXP 200 Dual-channel, VAV master controller 67.531 RXP 210 Air-volume alarm unit 67.535 RXP 212 Pneumatic operating unit