Explosion Proof Magnetic Flow Meter

# Electromagnetic Flowmeter with Converter ## Selection Table for Petrochemical Industry ### 1. Selection by Medium Type | Medium | Recommended Lining | Recommended Electrode | Suitable Converter | Notes | |--------|--------------------|-----------------------|--------------------|-------| | Crude oil / Oil-water mixture | Polyurethane / Neoprene | 316L / Hastelloy C | High-precision (explosion-proof) | Applicable for oil & water with sufficient conductivity | | Sand-containing wastewater / Oilfield injection water | Wear-resistant polyurethane | Titanium / Hastelloy C | Industrial enhanced type | Wear-resistant, anti-scour | | Dilute acids & alkalis (HCl, NaOH) | PFA / F46 (PTFE) | Tantalum / Hastelloy C | Anti-corrosion type | Best for strong corrosive media | | Slurry / Coal-water slurry / Residual slurry | Wear-resistant polyurethane | 316L / Titanium | Anti-interference type | No clogging, no pressure loss | | Circulating water / Boiler water | Rubber | 316L | General type | Cost-effective & reliable | --- ### 2. Selection by Operating Conditions #### Temperature - Normal temperature (0–80°C): Rubber lining - Medium temperature (80–150°C): F46 / PFA - High temperature (150–180°C): PFA + high-temperature converter #### Pressure - Normal / Low pressure: PN16 - Medium pressure: PN25 / PN40 - High-pressure oilfield injection: PN63 / PN100 + high-pressure sensor #### Explosion Protection - Petrochemical & oil-gas zones: **Ex d IIC T6** explosion-proof converter required - Indoor safe area: Standard or intrinsic safety type --- ### 3. Standard Converter Functions - Output: 4–20mA + Pulse + RS485 (Modbus) - Display: Instant flow, total flow, percentage, fault codes - Features: Empty pipe detection, small signal cutoff, adjustable damping, self-diagnosis - Power supply: 24VDC / 220VAC (24VDC preferred in petrochemical plants) --- ### 4. Non-Applicable Media - Non-conductive media: gasoline, diesel, pure alcohol, etc. - Ultra-pure water with conductivity < 5μS/cm - High-temperature gas and steam --- ### 5. Quick Selection Guide - Electromagnetic flowmeters are ideal for crude oil and wastewater. - Choose wear-resistant or corrosion-resistant materials based on medium. - Use tantalum electrodes for acids & alkalis, PTFE for high temperatures. - Explosion-proof models are mandatory in oil and gas zones.

RBEFB battery powered electromagnetic flow water meter is designed specifically for the water industry to meet the city's water supply to ensure the accurate calculation, the scene is widely used in places without power supply, such as urban water supply, sewage treatment, water conservancy and other industries.

Battery-powered electromagnetic flow meter specially designed sensor excitation system, and high-performance lithium battery-powered systems, and uses 16-bit AMD embedded processor power, with all-digital signal processing, measurement stability, high measurement accuracy, anti - Interference ability, and other features, automatic bi-directional flow measurement, on-site instantaneous flow of positive and negative cumulative total to show that self-diagnosis alarm FAULT Far GSM wireless data functions, the user through the powerful GSM / GPRS remote management software system can flow Far total wireless data storage functions.

The magnetic flow meter fulfils the special customer demands to water applications within abstraction, distribution network, revenue metering as well as irrigation.

Precision irrigation for higher yields. The RB Irrigation Magmeter is specifically built for agricultural environments. Its full-bore design ensures zero pressure loss and prevents clogging from sand or debris. With an IP68 waterproof rating and optional battery power, it provides reliable flow data for farm water management and smart irrigation systems.

Specifications:

Accuracy: ±0.5% of reading.

Power: 220V AC / 24V DC / 3.6V Battery Powered.

Protection: IP65 (Standard) / IP68 (Submersible).

Liner: Hard Rubber or F46 (Abrasion resistant).

Output: Pulse, RS485 Modbus, GPRS/NB-IoT.

Key Advantages:

Anti-Clogging: No moving parts; perfect for water containing sediment.

Cost-Efficient: Long service life with minimal maintenance.

Smart Farming: Supports remote data upload via wireless modules.

Description

Principle
Features
Specification
Model Selection
Applicants
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Principle

Faraday’s law of electromagnetic induction states that an inductive voltage is generated when a conductor moves through a magnetic field. This principle is used as the basis of flow measurement in the RBEF electromagnetic flow meter. In the electromagnetic flow meter, the flowing fluid corresponds to the moving conductor as described in Faraday’s law.

U_E ∞ B * D * v

The induced voltage UE is directly proportional to magnetic field intensity (B), electrode spacing (D) and average fluid velocity (v). Since magnetic field intensity (B) and the electrode spacing (D) are constant values, induced voltage U_E is therefore directly proportional to the average flow velocity (v).

Q = (∏ * D2) / 4 * v therefore U_E ∞ Q

The equation for calculating volumetric flow rate (Q) shows that the induced voltage (UE) is linear and directly proportional to the average velocity (v). In the flowmeter transmitter, the induced voltage (UE) from the electrodes is used to calculate volumetric flow rate (Q) based upon the pipe’s internal diameter.

U_E = Induced voltage

B = Magnetic field strength

D = Electrode spacing

V = Fluid velocity

Q = Instantaneous volumetric flow rate

Features

RBEFB Battery powered Emag Flow Meter Features:

Micro power design, five section 3.6 V lithium batteries, continuous uninterrupted work five to ten years, and replace the battery is convenient.
The display USES a large screen LCD liquid crystal display; it can display instantaneous flow, velocity (line pressure), forward and reverse accumulated amount and alarm prompt flow parameters, etc.
Measuring tube is dynamic and resistance components won't produce winding, blocking phenomenon, almost no pressure loss, but long-term reliable work continuously.
Wide measuring range: velocity measurement range can be up to 0.01 m/s ~ 12 m/s
Measuring stability: measuring accuracy from measured medium temperature, pressure, viscosity, density changes in the physical parameters.
Pulse, RS232 / RS485 interface and GSM/GPRS wireless data remote transmission function.
With data save function: can save 1000 groups of data flow, and data storage time interval can be arbitrary Settings and data query.

Specification

RBEFB Battery operated Emag Flow Meter Technical parameters

Diameter	DN10-DN1200 DN150- DN1200 (Also optional plug-in battery-powered electromagnetic flow meter)
Pressure	0.6～4.0Mpa(Special pressure customizable)
Accuracy	±0.5%、±1.0%
Measuring range	0 ~±12m / s
Media Measurement (conductivity)	> 20μs/cm
medium temperature	-10 ℃ ~ 90 ℃, ≤180℃(Remote type)
ambient temperature	-40 ℃ ~ 65 ℃
power supply	3.6V/DC built-in lithium battery-powered, continuous working hours, more than 6 years
Electrode materials	316L stainless steel, HC, HB, titanium, tantalum, platinum / iridium alloy
lining materials	poly chloroprene rubber, polyurethane rubber, PTFE, F46, PFA
Connections	flange type, plug-in, clip pattern
Structure in the form of	a body divided body
Level of protection	IP68 and IP65(Remote type)
Display	LCD large-screen liquid crystal display instantaneous flow of positive / reverse the cumulative total and prompt warning
Output	Local display(optional pressure display): 1. GPRS, RS485 can be powered by battery 2. 4-20mA, Pulse and 4-20mA+Hart is powered by 12-30VDC
Means of communication	GPRS(compact and remote type), GSM, Mobus, Hart

Appearance and size of the installationTable

Diameter	Pressure	Dimension(mm)				Weights	Remark
（mm）	MPa	a	b	C	d	kgs
25	4.0	200	146	121	115	5.5
32		200	161	139	140	6.5
40		200	161	139	150	6.5
50		200	199	160	165	7.5
65		200	209	173	185	12
80		200	216	173	200	12
100	1.6	250	267	233	220	14
125		250	278	233	250	19
150		300	308	257	285	22
200	1.0/1.6	350	366	291	340	45
250		400	418	331	395	65
300		500	481	381	445	95
350		500	529	428	505	135
400		600	587	483	565	170
450		600	620	533	615	210
500		600	675	585	670	230
600		600	790	685	780	255
700		700	900	800	895	315
800		800	1015	905	1015	335
900		900	1115	1002	1115	435
1000		1000	1230	1110	1230	595
1200		1200	1420	1295	1405	720

Battery Working Time

Table 4.1.Corresponding Table of Battery life and Interval Measurement Time

(Excitation Mode 1)

Cycle Measuring Time	50mA Excitation Use Time	20mA Excitation Use Time
30S	120 months	200 months
15S	60 months	100 months
14S	56 months	93 months
13S	52 months	86 months
12S	48 months	79 months
11S	44 months	73 months
10S	40 months	66 months
9S	36 months	59 months
8S	32 months	53 months
7S	28 months	46 months
6S	24 months	39 months
5S	20 months	33 months
4S	16 months	26 months
3S	12 months	19 months

Table 2 Battery Life Coefficient Corresponding Excitation Mode

Excitation Mode	Mode 1	Mode 2	Mode 3	Mode 4
Battery Life Coefficient	1.0	0.85	0.75	0.60

When the sensor has large diameter, the corresponding excitation cycle is long (see excitation mode parameter), therefore there is more power consumption.

Model Selection

RBEFB Battery operated Emag Flow Meter Model selection

RBEFB-	DN	-		-		-		-		-		-		-		-		-		-		-		-		-
	1		2		3		4		5		6		7		8		9		10		11		12		13		14

1 Nominal Diameter(mm)/ [inches] ⁽¹⁾

0003[1/8”]	0050 [2”]	0300 [12”]
0006 [1/4”]	0065 [2½]	0350 [14”]
0010 [2/5”]	0080 [3”]	0400 [16”]
0015 [½”]	0100 [4”]	0450 [18”]
0020 [¾”]	0125 [5”]	0500 [20”]
0025 [1”]	0150 [6”]	0600 [24”]
0032 [1¼]	0200 [8”]	0700 [28”]
0040 [1½]	0250 [10”]	0800 [32”]

2 Flange Rating ⁽¹⁾

02	0.25 MPa	1600 … 800
06	0.6 MPa	700 … 800
10	1.0 MPa	200 … 800
16	1.6 MPa	15 … 600
20	ANSI Class 150	15 …800
40	4.0 MPa	15 … 150
50	ANSI Class 300	15 … 800
AA	Special

3 Electrode Material

1	316L Stainless Steel
3	Hastelloy C-22
4	Hastelloy B-10
5	Titanium
6	Tantalum
7	Platinum / Iridium Alloy
8	Tungsten Coated Stainless Steel
9	ceramic

4 Lining Material

1	Neoprene (Hard rubber)	≤ 3000
2	PTFE	≤ 1000
3	Polyurethane	≤ 300
4	PFA	≤ 250
5	Tefzel	≤ 250
6	PFA with Wire Net	80 … 250
7	Tefzel with Wire Net	80 … 250
8	Ceramic	15 … 200

5 Grounding and Lining Protection

0	Flange ground	15 … 800
1	Earth ring	15 … 250
2	Ground electrode	50 … 800
3	Inlet protection ring	50 … 800

6 Max. Process Temperature

A	80°C	All Linings
B	120°C	Neoprene / PTFE / PFA / Tefzel
C	180°C	PTFE only

7 Environmental Protection Class

1	IP65 (Remote Type Only)
2	IP68

8 Explosion Proofing

1	None

9 Configuration – sensor/transmitter

1	Compact (15 … 1000)
2	Remote (with 10m cable)⁽²⁾
3	Wafer

10 Power Supply

B	Battery
D	DC: 18 … 36 VDC

11 Display and Programming

2	2 line LCD display + keypad programming
3	3 line LCD display + keypad programming

12 Output and Input

0	RS485(Battery) +Pulse (External)
2	GPRS (Battery)
3	GSM(Battery)

13 Calibration Specification

1	3 point, 1% accuracy
2	3 point, 0. 5% accuracy
3	3 point, 0. 25% accuracy

14 Flow Tube Configuration

1	Flange Type	15 … 800
D	DIN
A	ANSI
O	Others(pls clarify)
2	Flange type with removable electrodes	15 … 800
3	Flange +Body material
C	Carbon Steel
S	304 Stainless Steel

(1) Line size selection will be inches for ANSI Class 150/300 rating selection, DIN size for all other ratings

(2) Order longer cable length separately

(3) Ceramic liner and electrodes is with wafer type only

Applicants

Battery operated Magmeter(Emag flow meter) Application

Raw water, potable water, irrigation water
Leakage Detection Solution
Water distribution network monitoring and remote locations
Pump performance monitoring;
Wastewater and raw water metering
Well chambers, Groundwater Monitoring and Management Solutions
Water revenue metering for accurate billing
Monitoring of distribution networks
Pipeline leakage detection
Measuring water consumption
Utilities, Waterworks, water system
Irrigation water metering

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Catalog- Battery Powered Magnetic flow meter

Manual- Battery Powered Magnetic flow meter

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Explosion Proof Magnetic Flow Meter

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