AMETEK 7250 Digital Stick User Manual

7250X Digital Stik Sensor Data Sheet

Proven Magnetostrictive Sensing Performance
in a Revolutionary New Package

7250 Series

The 7250X Digital Stik takes f eld proven
magnetostrictive sensing technology
and packages it in a revolutionary new
way for greater reliability and easier
installation and mounting. It is ideal for
liquid level monitoring, interface level and
leak detection in a variety of liquid media
in both above ground and underground
storage tanks.

The 7250X Digital Stik combines low
power consumption with a patented high
resolution design. It requires only 5 volts
DC making it ideal for mobile, battery
operated and wireless applications.

The system has been designed to meet
EPA Leak Detection and API Inventory
Monitoring requirements and has
been approved for use in hazardous
environments.

The sensor’s electronics are SMT
components and integrated into a 5/8”
diameter sensing tube. This breakthrough
design eliminates the bulky electronics
enclosure at the top of the sensor and
offers greater options for insertion and
mounting.

The probe is constructed of 316 Stainless
Steel and comes with a variety of
connectors, including a mini connector
for quick connect applications, a single
3/4” NPT that can be used with a
compression f tting, a double 3/4” NPT for
mounting with a f ange or bushing, and a
1/2” right angle for use in low overhead
applications.

The 7250 communicates through a
single signal. The data is transmitted via
asynchronous serial communications
and is offered with serial protocol options
including an ASCII format. There are
other options available to OEMs for use
in developing a communications interface
with the probe. The patented design

allows for very high resolution on a low
power budget. The resolution of the 7250X
is 0.0001” with a linearity of 0.01% (See
specif cations).

Factory Mutual (FM) certif ed that the
7250X Digital Stik is Intrinsically Safe for
use in ethylene and propane (petroleum)
applications (See specif cations). The
7250X has been approved to the following
standards:

CSA C22.2 Nos. 25,142,157 and 213
FM 3600, 3610, 3611 and 3810
Cenelec EN 50014, 50020 and 50284

The 7250X has an inherently lower cost
design which results in savings. It provides
the same performance and reliability
as sensors that consume more power.
Combining low power requirements with
high resolution provides the ultimate
performance and reliability.

Specifi cations

Power Supply
Voltage

Current (at +5 VDC)

Operating Temperature
Sensing Area

Electronics Area

Pressure Rating

Resolution

Repeatability

Linearity

Hysteresis

Null Zone

Dead Band

Intrinsically Safe Barrier

Enclosure Material
Rating

+5 VDC ± 10% typical (+3.7 VDC min.)

10mA max. (8mA typical) plus

1.5mA max. (1mA typical) per temperature
sensor

-40°C to 100°C (Non Hazardous Location)

-40°C to 70°C (Hazardous Location)

-40°C to 70°C

Steel Probe: 1000 psi max.
Float: Dependent. Call Factory.

0.0001” (Protocol Dependent)

Equal to Resolution

Probes up to 288”: ± 0.01% of span
or ± 0.015”, whichever is greater.

Probes up to 288”: ± 0.002% of span
or ± 0.005”, whichever is greater.

R Style: 9”
D, S and M Style: 8”

2”

See Installation Drawing E0241200.
Consult Factory.

316 Stainless Steel IP68

Specifi cations are subject to change without notice. Patented.

Probe Length
Stainless Steel R Style

Stainless Steel D, S, M Style

(Probes available in 1” increments)

Hazardous Areas Approvals

FM

-40° O Tamb O 70° C
Class I, II, III, Div. 1
Groups C, D, E, F, G, T4
Class I, Div. 2
Groups A, B, C, D, T4
Class I, Zone 0, AEx ia IIB T4

ATEX
Ex ia IIB T4
NEMKO 05 ATEX 1219X

0344

II 1G

Sanitary Approvals

(3A

74-03)

21” to 288”

20” to 288”

Consult Factory for
longer lengths

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AUTOMATION & PROCESS TECHNOLOGIES

®

7250X Digital Stik Stainless Steel Sensor

7250X.D5R
05/12.Z193

Part Numbering

725 0 X M LLL F1 XXX X XX

7250
Digital Stik

Output Protocol
2 = 25 level readings
5 = 10 level readings

Style/Material
X = 316 Stainless Steel

Consult factory for other
options.

Connector Style
M = 4 Pin Mini
R = 1/2” NPT Right Angle
D = 3/4” NPT Dual
S = 3/4” NPT Single

Span

In 1” increments
i.e. 072 = 72” (Min 8” Max 278”. Max
span is equal to overall length -10)

RX

Number of Temp Points
R1 = 1 Sensor,18”*
R5 = 5 Sensors
T1 = 1 Sensor, 4”*

*From the bottom of the probe.

# of Floats
F1 = 1 Float
F2 = 2 Floats

Overall Length

In 1” increments
i.e. 072 = 72”
(Min 18” Max 288”)

Mounting Style
X = None

Special Mounting
XX = None

Dimension Drawing

M Connector

M STYLE

OVERALL LENGTH (O.A.L.)

7/8-16 UNS-2A

1.00

8.00" NULL ZONE

.625

TEMPERATURE SPAN

2.00"
DEAD
BAND

Accessories

Item Part Number

Float Kit, 316 SS, 2.05” Diameter w/ E Clip and Spacer 0.54s.g. SD0515000

Float Kit, Nitrophyl, 2.02” Diameter w/ E Clip and Spacer 0.40s.g. SD0536500

Cable Assembly, 4 pin, 6 feet long (M style only) 01533141

Adjustable Tube Coupling 5/8” x 3/4” NPT 04283800

Junction Box, side mount, N4X with zero & span push buttons SD0536101

Bushing, 3/4” x 2” NPT 316SS 04587241

Intrinsically Safe Entity Parameters

V

max

I

max

7.93 V 280mA 1.0 W 30.1μF0μH

AUTOMATION & PROCESS TECHNOLOGIES

P

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1080 N. Crooks Road, Clawson, MI 48017-1097
Phone: [phone] Toll Free: 800.635.0289 Fax: [phone] www.ametekapt.com

Copyright 2011 by AMETEK Automation & Process Technologies. All Rights Reserved.

C

I

Wiring Diagram

Common

(Black wire)

1

Data Signal
(White wire)

243

Connector View

Contact Factory for additional drawings.

L

I

Drain

(Cable Shield, chassis

gorund on ss housing

probes)

Power

(Red wire)

7250X.D5

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