Products

DESCRIPTION

Basic Info

Model NO.	TMF
Measuring Media	Gas
Measuring Principle	Thermodynamic
Measurement Object	Closed Pipeline
Certification	JIS, DIN, ANS, CE, ISO
Output Signal	4~20mA, RS485, Pulse, Hart
Power Supply	24VDC,220VAC
Process Temperature	-40-450 Degree C
Sensor Type	Flange, Insertion, Clamp,
Construction	Compact and Remote
Pipe Material	Carbon Steel, Stainless Steel, Plastic, etc
Display	4 Lines LCD Display Mass Flow, Volume Flow in Stan
Transport Package	Export Standard Packing
Specification	Ex-proof: ExdIICT4
Trademark	Tianjin U-ideal
Origin	Tianjin, China
HS Code	90261000
Production Capacity	10000PCS/Year

Product Description

Thermal mass gas flow meterIntroduction

1. Thermal gas mass flow meter is designed on the basis of thermal dispersion, and adopts method of constant differential temperature to measuring gas flow. It has advantages of small size, easy installation, high reliability and high accuracy, etc.
2. The meter contains two platinum resistance temperature sensors. The thermal principle operates by monitoring the cooling effect of a gas stream as it passes over a heated sensor.
3. Gas flowing through the sensing section passes over two sensors one of which is used conventionally as a temperature sensor, whilst the other is used as a heater.
4. The temperature sensor monitors the actual process values whilst the heater is maintained at a constant differential temperature above this by varying the power consumed by the sensor.
5. The greater the gas velocity, the greater the cooling effect and power required to maintain the differential temperature.
6. The measured heater power is therefore a measure of the gas mass flow rate.

Features

1. Measuring the mass flow or volume flow of gas
2. Do not need to do temperature and pressure compensation in principle with accurate measurement and easy operation.
3. Wide range: 0.5Nm/s~100Nm/s for gas. The meter also can be used for gas leak detection
4. Good vibration resistance and long service life. No moving parts and pressure sensor in transducer, no vibration influence on the measurement accuracy.
5. Easy installation and maintenance. If the conditions on site are permissible, the meter can achieve a hot-tapped installation and maintenance. (Special order of custom-made)
6. Digital design, high accuracy and stability
7. Configuring with RS485 or HART interface to realize factory automation and integration

Description	Specification
Medium	Gas(Except acetylene)
Pipe size	DN10-4000mm
Sensor type	Standard Insertion, Hot-tapped Insertion and Flanged
Construction	Compact and Remote
Sensor Housing Material	SS304 or SS 316
Pipe Material	Carbon steel, stainless steel, plastic, etc
Velocity	0.1-100N/ms
Medium temperature	Sensor: -30~+200ºC ;Max.350ºC Transmitter:-20-+45ºC
Working pressure	Medium pressure≤1.6MPa
Accuracy	±1.0~2.5%
Power supply	Compact type: 24VDC or 220VAC, Power consumption ≤18W Remote type: 220VAC, Power consumption ≤19W
Response time	1S
Output	4-20mA (optoelectronic isolation, maximum load 500Ω), Pulse,RS485 (optoelectronic isolation) and HART
Alarm output	1-2 line Relay, Normally Open state, 10A/220V/AC or 5A/30V/DC
Display	4 lines LCD display Mass flow, Volume flow in standard condition, Flow totalizer, Date and Time, Working time, and Velocity, etc.
Protection class	IP65

Upper Range Value of Common Gas
(Unit: Nm3/h. The follow table can be extended)

Nominal Dia.(mm)	Air	Nitrogen(N2)	Oxygen(O2)	Hydrogen(H2)
15	65	65	32	10
25	175	175	89	28
32	290	290	144	45
40	450	450	226	70
50	700	700	352	110
65	1200	1200	600	185
80	1800	1800	900	280
100	2800	2800	1420	470
125	4400	4400	2210	700
150	6300	63000	3200	940
200	10000	10000	5650	1880
250	17000	17000	8830	2820
300	25000	25000	12720	4060
400	45000	45000	22608	7200
500	70000	70000	35325	11280
600	100000	100000	50638	16300
700	135000	135000	69240	22100
800	180000	180000	90432	29000
900	220000	220000	114500	77807
1000	280000	280000	141300	81120
1200	400000	400000	203480	91972
1500	600000	600000	31800	10152
2000	700000	700000	565200	18048