Dwyer Thermal Dispersion Flow Transmitter

Dwyer Thermal Dispersion Flow Transmitter 60 ul li MsoNormal table MsoNormalTable p MsoNormal auto style1 EXAMPLE TDT W S 1 1 1 Series TDT WS 111 Thermal Dispersion Transmitter water base 316SS 0 1 64 ft s 0 0 5 m s 10 28 261 mm extension 1 flow output SERIES TDT Thermal Dispersion Transmitter BASE TYPE W L Water Based Fluids Oil Based Fluids WETTED MATERIAL S T 316 SS Titanium RANGE 1 2 3 4 5 0 1 64 ft s 0 0 5 m s 0 3 28 ft s 0 1 m s 0 6 56 ft s 0 2 m s 0 9 87 ft s 0 3 m s 0 12 47 ft s 0 3 8 m s EXTENSION 0 1 2 None 10 28 261 mm 15 75 400 mm OUTPUT 1 2 1 flow output 1 flow output plus one temperature output The Series TDT is an excellent alternative to turbine and paddlewheel insertion flow meters with the ability to deliver high accuracy over a wide range of pipe sizes This unit has the same insertion mounting into a 1 1 2 NPT but no moving parts to wear break or clog This transmitter has available extensions that can be used for pipes sized up to 75 in diameter The TDT Dispersion Transmitter measures even very low flow rates due to the applied calorimetric principle and can be used for the metering of all fluid media such as water oil aggressive media paste glue sludge grease etc Optional titanium allows this transmitter to be used with an even wider range of corrosive media and the optional output allows the user to measure both flow and temperature When deciding on the correct length use the 1 7th law the TDT s probe length needs to measure 1 7th of the pipe diameter PRINCIPLES OF OPERATION The sensor head of the Thermal Dispersion Transmitter contains two PT resistors One of them is measuring the temperature of the media while the other is heated by an attached heating resistor The temperature difference between the two PT resistors is predetermined and a control circuit keeps this temperature difference constant The flow of the media cools the heated PT resistor proportional to the speed of the flow this results in a linear output signal proportional to the flow speed Service Water oil compatible liquids paste glue sludge and grease Wetted Materials 316 SS optional titanium Flow Range Flow Range Min 0 to 0 66 ft s 0 to 20 cm s Max See Catalog page Temperature Range For optional output only 32 to 212 F 0 to 100 C Accuracy 3 of full range Repeatability 1 Response Time 10 seconds Temperature Limits Process 32 to 176 F 0 to 80 C Ambient 4 to 160 F 20 to 70 C Pressure Limits 261 psi 18 bar Process Connections 1 1 2 male NPT Signal 4 to 20 mA for flow optional 4 to 20 mA for temperature Power Requirements 24 VDC 10 to 15 Resistive Load 0 to 600 Current Consumption Approx 100 to 200 mA max flow Electrical Connection 6 5 ft 2 m molded oilflex cable with three 21 AWG 0 5 sq mm wires Enclosure Rating NEMA 4X IP65 Weight 2 lb 907 g