Signet 2551 Magmeter Flow Sensor

Signet 2551 Magmeter is an insertion style magnetic flow sensor that features no moving parts. The patented* sensor design is available in corrosion-resistant materials to provide long-term reliability with minimal maintenance costs. Material options include PP with stainless steel, PVDF with Hastelloy-C, or PVDF with Titanium.

Signet 2551 Magmeter Flow Sensor

Utilizing the comprehensive line of Signet installation fittings, sensor alignment and insertion depth is automatic. These versatile, simple-to-install sensors deliver accurate flow measurement over a wide dynamic range in pipe sizes ranging from DN15 to DN900 (½ to 36 in.), satisfying the requirements of many diverse applications.

Signet 2551 Magmeters offer many output options of frequency/digital (S3L) or 4 to 20 mA which are available on both the blind and display versions. The frequency or digital (S3L) sensor output can be used with Signet’s extensive line of flow instruments while the 4 to 20 mA output can be used for a direct input to PLCs, chart recorders, etc.

Both the 4 to 20 mA output and digital (S3L) sensor interface is available for long distance signal transmission. An additional benefit is the empty pipe detection which features a zero flow output when the sensors are not completely wetted. Also, the frequency output is bi-directional while the 4 to 20 mA output can be set for uni- or bi-directional flow using the display or the 3-0252 Configuration Tool which connects to PCs for programming capabilities.

In addition, the display version of the 2551 Magmeter is available with relays and features permanent and resettable totalizer values, which can be stored and seen on the display. The display also contains multi-languages in English, Spanish, German, French, Italian and Portuguese menu options.

Signet 2551 Magmeter Features

• Test certificate included for -X0, -X1
• Patented Magmeter technology*
• No moving parts
• Bi-directional flow
• Empty pipe detection
• Installs into pipe sizes DN15 to DN900 (0.5 to 36 in.)
• Operating range 0.05 to 10 m/s (0.15 to 33 ft/s)
• Accurate measurement even in dirty liquids
• Polypropylene and PVDF retaining nuts standard, Valox optional
• 4 to 20 mA, digital (S³L), frequency, relay output (Display only)
• No pressure drop
• Corrosion resistant materials; PP or PVDF with SS, Hastelloy-C, or Titanium
• Multi-language display menu available

Applications

• Chemical Processing
• Water and Wastewater Monitoring
• Metal Recovery and Landfi ll Leachate
• Commercial Pools, Spas, and Aquariums
• HVAC
• Irrigation
• Scrubber Control
• Neutralization Systems
• Industrial Water Distribution

Signet 2551 Magmeter Specifications

General
Operating Range	0.05 to 10 m/s	0.15 to 33 ft/s
Pipe Size Range	DN15 to DN900	½ to 36 in.
Linearity	± 1% reading plus 0.1% of full scale
Repeatability	±0.5% of reading @ 25 °C (77 °F)
Minimum Conductivity	μS/cm
Wetted Materials
Sensor Body/Electrodes and Grounding Ring	-P0, -P1, -P2: PP/316L SS
	-T0, -T1, -T2: PVDF/Titanium
	-V0, -V1, -V2: PVDF/Hastelloy-C
O-rings	FKM (standard),
	EPR (EPDM), FFKM (optional)
Case	PBT
Display Window	Polyamide (transparent nylon)
Protection Rating	NEMA 4X/IP65
Electrical
Power Requirements	4 to 20 mA	VDC ±10%, regulated, 22.1 mA max.
	Frequency	to 24 VDC ±10%, regulated, 15 mA max.
	Digital (S3L)	to 6.5 VDC, 15 mA max.
Auxiliary (only required for units with relays)		to 24 VDC, 0.4 A max.
Reverse Polarity and Short Circuit Protected
Current Output 4 to 20 mA	Loop Accuracy	32 μA max. error (25 °C @ 24 VDC)
	Isolation	Low voltage < 48 VAC/DC from electrodes and auxiliary power
	Maximum Cable	300 m (1000 ft)
	Error condition	22.1 mA
	Max. Loop Resistance	300 Ω
	Compatible with PLC, PC or similar equipment
	4 to 20 mA load needed
Frequency Output	Output Modes	Freq., or Mirror Relay (display version only)
	Max. Pull-up Voltage	30 VDC
	Max. Current Sink	50 mA, current limited
	Maximum Cable	300 m (1000 ft)
	Compatible with Signet Model 8900, 9900, 9900-1BC, 9950
Digital (S3L) Output	Serial ASCII, TTL level 9600 bps
	Compatible with Model Signet 8900, 9900, 9950 and 0486
Relay Specifications
#1, #2 Type	Mechanical SPDT
Rating	5 A @ 30 VDC max., 5 A @ 250 VDC max.
#3 Type	Solid State
Rating	50 mA @ 30 VDC, 50 mA @ 42 VAC
Hysteresis	User adjustable for exiting alarm condition
Alarm On Trigger Delay	Adjustable (0 to 9999.9 sec.)
Relay Modes	Off , Low, High, Window, and Proportional Pulse
Relay Source	Flow Rate, Resettable Totalizer
Error Condition	Selectable; Fail Open or Closed
Display
Characters		2 x 16
Contrast		User-set in four levels
Backlighting (only on relay versions)		Requires external 9-24 VDC, 0.4 mA max.
Max. Temperature/Pressure Rating
Storage Temperature		-20 °C  to 70 °C
Relative Humidity		0 to 95% (non-condensing)
Operating Temperature	Ambient	-10 °C to 70 °C
	Media	0 °C to 85 °C
Maximum Operating Pressure		10.3 bar @ 25 °C
		1.4 bar @ 85 °C
Shipping Weight
	0.680 kg	1.50 lb
Standards and Approvals
	CE, FCC, UL, CUL, NSF (3-2551-PX-XX version only)
	RoHS compliant, China RoHS
	NEMA 4X / IP65 Enclosure (with cap installed)
	Manufactured under ISO 9001 for Quality and ISO 14001 for Environmental Management and OHSAS 18001 for Occupational Health and Safety

Download Datasheet: Signet 2551 Magmeter Flow Sensor

Reference : gfps.com