OXFTM Thermal Mass FlowMeter - MENA Process Instruments

About Us

WORKING PRINCIPLE

OXFTM Series Thermal Mass Flowmeter measures the gas mass flow base on thermal diffusion theory. It has two filmed RTDs as its sensors, one of which sense the velocity of the gas flow (RH) and the other one will detect the temperature shift of the gas flow (RMG). When the two RTD are in the gas flow ,the RH will be heated while the RMG will sense the temperature changing of the gas flow. More heat will be taken away as the velocity of the gas flow increasing, so the temperature on RH will decline.

SPECIAL FEATURES

Direct mass flow or normalized flow measurement
100:1 turn down ratio in 5 ranges: 0.3-30Nm/s, 0.6Nm/s-60 Nm/s,
9-90Nm/s, 1.2-120Nm/s, or 1.5–lS0Nm/s
No pressure loss, suitable for pipe in any shape with known sectional area
For the insertion type, installation and maintenance can be performed while in service
High accuracy data acquisition circuit to ensure outstanding repeat ability and accuracy
Real time Natural Gas composition mixture (C4-C6) input via Modbus for higher accuracy measurements
High efficiency design of power supply, the total power consumption is only 60mA@24VDC
16V-32V wide voltage range input
Self-diagnose function plus remote diagnose function, ensure easier trouble-shooting and meter verification for accuracy and reliability
Ex-proof version optional
Bluetooth communication for reading, setting and diagnosis through Smart Device APP
No moving parts

Parameter	Specification
Flow Range	0.25 to 150 SFPS (Standard Feet Per Second)
Accuracy	±1% of reading ±0.5% of full scale
Repeatability	±0.2% of full scale
Turn-down Ratio	Up to 100:1
Operating Temperature	-40°C to +100°C
Pressure Rating	Up to 300 psig (standard), higher options available
Power Supply	24 VDC or loop-powered
Output Signal	4–20 mA, HART, Modbus RTU
Enclosure	NEMA 4X/IP66
Sensor Material	316L Stainless Steel
Mounting	Inline or insertion type
Display	Optional local display with keypad

Probe	H	L
11.42″ (290 mm)	17.07″	10.06″
17.32″ (440 mm)	22.97″	15.97″
27.12″ (690 mm)	32.82″	25.81″
39.37″ (1000 mm)	45.02″	38.01″
59.06″ (1500 mm)	64.71″	57.70″

MAX PIPE SIZE THAT EACH PROBE CAN ADAPT TO
Probe length	290mm	440mm	690mm	1000mm	1500mm
T < 50 dgr C	DN150	DN450	DN900	DN1500	DN2500
50 °C < T < 150 °C	I	DNl00	DN600	DN1200	DN2200
150 °C < T < 250 °C	I	I	DN400	DNl000	DN2000
250 °C < T < 450 °C	I	I	DN300	DN600	DNl000
T < 122 °F	6″	18″	36″	60″	100″
122 °F < T < 302 °F	I	4″	24″	48″	88″
302 °F < T < 482 °F	I	I	16″	40″	80″
482 °F < T < 842 °F	I	I	12″	24″	40″

OTHER PROCESS CONNECTION

Flanged insertion type

For applications with pressure higher than 230 psig (1.6MPa)

Flanged type

For in-line connection, 230 psig- 914 psig (1.6 - 6.3 MPa) and different flanged standard available

STANDARD VOLUME FLOW RATE RANGE IN POPULAR SIZES

Pipe size (mm)	Pipe size (inch)	Option 1 (0.3-30 Nm/s)		Standard (0.6-60 Nm/s)		Option 2 (0.9-90 Nm/s)		Option 3 (1.2-120 Nm/s)
		Min flow Nm³/hr	Max flow Nm³/hr	Min flow Nm³/hr	Max flow Nm³/hr	Min flow Nm³/hr	Max flow Nm³/hr	Min flow Nm³/hr	Max flow Nm³/hr
		25	1″	0.53	53	1.05	105.9	1.58	158.8	2.11	211.8
32	1¼”	0.87	86.7	1.73	173.5	2.6	260.3	3.47	347.1
40	1½”	1.36	135.6	2.71	271.1	4.06	406.7	5.42	542.3
50	2″	2.12	211.9	4.23	423.7	6.35	635.5	8.47	847.4
65	2½”	3.58	358.1	7.1	716.1	10.7	1074.1	14.3	1432.2
80	3″	5.42	542.3	10.8	1084.7	16.2	1627.1	21.6	2169.4
100	4″	8.47	847.5	16.9	1694.9	25.4	2542.3	33.8	3389.8
125	5″	13.2	1324.2	26.4	2648.3	39.7	3972.4	52.9	5296.6
150	6″	19.1	1906.8	38.1	3813.5	57.2	5720.3	76.2	7627.1
200	8″	33.9	3389.8	67.7	6779.6	101.6	10169.4	135.5	13559.3
250	10″	53	5296.6	105.9	10593.2	158.8	15889.8	211.8	21186.4
300	12″	76.3	7627.1	152.5	15254.2	228.8	22881.3	305	30508.4

Mode number

The standard model number is usually OXFTM-1-2-12-1-N-T-M-N-1-1-XXXX,
Please reference to the table below for what the model codes stand for.

Section	Code	Description	Type
General model	OXFTM		Standard
		Air/nitrogen	Standard
2 Fluid type	2	Oxygen (sensor will be degreased)	Option
	3	Other (Please advise gas composition)	Option
		0.3-30 Nm/s	Option
	2	0.6-60 Nm/s	Standard
3 Measurement	3	0.9-90 Nm/s	Option
range	4	1.2-120 Nm/s	Option
	5	1.5-150 Nm/s	Option
	6	1.8-180 Nm/s	Option
	11	Insertion type with 290mm probe	Option
	12	Insertion type with 440mm probe	Standard
	13	Insertion type with 690mm probe	Option
	14	Insertion type with 1000mm probe	Option
	15	Insertion type with 1500mm probe	Option
	Fl	Flanged insertion type up to 25 barG (362 psiG)	Option
	F2	Flanged insertion type up to 40 barG (580 psiG)	Option
	F2	Flanged insertion type up to 63 barG (913 psiG)	Option
4 Process	Dl	Flanged DIN PN16 up to 16 barG (232 psiG) (DN15-DN300)	Option
connection	D2	Flanged DIN PN25 up to 25 barG (362 psiG) (DN15-DN300)	Option
	D3	Flanged DIN PN40 up to 40 barG (580 psiG) (DN15-DN300)	Option
	D4	Flanged DIN PN63 up to 63 barG (913 psiG) (DN15-DN300)	Option
	Cl	Flanged ANSI CL150 up to 16 barG (232 psiG) (0.5 inch–12 inch)	Option
	C2	Flanged ANSI CL300 up to 40 barG (580 psiG) (0.5 inch–12 inch)	Option
	C3	Flanged ANSI CL400 up to 63 barG (913 psiG) (0.5 inch–12 inch)	Option
	Jl	JIS 10K up to 16 barG (232 psiG) (DN15–DN300)	Option
	J2	JIS 20K up to 40 barG (580 psiG) (DN15–DN300)	Option
	J3	JIS 30K up to 63 barG (913 psiG) (DN15–DN300)	Option
5 Wetted part		316ss sensor with 304ss wetted parts	Standard
material	2	316ss sensor with 316ss wetted parts	Option
Medium temp	N	< 150°C	Standard
6 range	Q	< 250°C	Option
	H	< 450°C (please select remote display also)	Option
7 Transmitter	T	Integral	Standard
	R	Remote	Option
8 Cable grinder	M	M20 x 1.5	Standard
	N	NPT 1/2	Option
9 Ex-proof	N	No Ex-proof	Standard
		NEPSI Ex d IIC T3 Gb	Option
		pulse/frequency + 4-20mA + RS485 + Bluetooth	Standard
	2	pulse/frequency + 4-20mA @ HART + Bluetooth	Option
11 Power supply		13.5–42VDC	Standard
	2	13.5–42VDC with 85–265VAC 50/60Hz power converter	Option
12 Pipe size	xxxx	Please use 4-digit pipe size, such as DN50=0050, DN300=0300	xxxx