Guided Radar with 2-wire system

TGF1100
Micro Pulse Level MeterOUTLINE
The TGF1100 series is a unique 2-wire continuous level-measuring
instrument using TDR technology.
The simple and compact design suitable for tank-top installation
with no moving parts has a high cost performance with themaintenance-free and low cost installation by the simple 2-wireloop powered system. This continuous level meter become
applicable to wide services inclouding various liquid and powders
using by coaxial and single cable probes. The keypad operation on
the front display allows easy parameter setting including zero point
adjustment and measuring range. The micro pulse level meter issuitable for tank and silo inventory for liquids and powders as wellas level controls of the intermediate tanks and vessels.

FEATURES¢ Wide applications by TDR technology¢ 2-wire loop powered system with less cable and low installationcost¢ A current output is selectable from level, distance, volume ormass¢ From − 50°C to 100°C and from full vacuum to 1.6 MPa¢ No inﬂuence from changes in temperature, pressure or density¢ The probe can be cut in short on site to the application¢ Start to measure with a minimum setting after installation¢ Measuring Max. 20 m in liquids and 10 m in powders¢ Easy mounting on top of tanks¢ No moving parts and less maintenance¢ Display language in English, Japanese or others and easy
operation

MEASURING PRINCIPLEThis Guided Radar level meter TGF1100 has been developed froma proven technology called Time Domain Reflectometry (TDR).
The device transmits intermittently low-intensity electromagnetic
pulses along a rigid or flexible conductor called a coaxial probe
or single cable probe. These pulses move at the speed of light.
When the pulses reach the surface of the product to be measured,
the pulses are reflected back to the signal converter. The device
measures the time from when the pulse is transmitted to when it
is received: half of this time is equivalent to the distance from thereference point of the device to the surface of the product. The
time value is converted into an output current of 4 to 20 mA whichcorresponds to the level height. The traveling speed of the pulses
is constant about 300, 000 km/second same as light regardlessof the changes in conditions. Therefore, dust, foam, vapor,agitated surfaces, boiling surfaces, changes in pressure, changes
in temperature, changes in dielectric constant and changes indensity do not have an eﬀect on device performance.

① Transmitted pulse② Reﬂected pulse③ Pulse amplitude④ Measuring range⑤ Air : Er ≒ 1⑥ Measured objects: Er > 1.6 for coaxial probe
Er > 2.1 for single cable probe
TG-L1015-0E
1st edition Jul 2015 K

TGF1100

Micro Pulse Level Meter

STANDARD SPECIFICATION
Objects

Item
Measuring material
Measuring objects Measuring principle
Measuring variables
TGF1121
Probe type and

TGF1131

measuring range
Dead zone
Outputs
Resolution
Error outputs

Outputs

Load resistanceAccuracy
Accuracy

Measuringconditions

Speciﬁcation of
instrument

Electric

Resolution
Repeatability
Max. rate of change
Temperature of process connection
Thermal shock resistancePressure
Dielectric constantMax. dia. of granules
Protection class
Ambient temperature
Display
Storage temperature
Type
Power supply

connection

Materials

Cable entry
Cable entry capacity (Terminal)
Housing
Process connection
Single cable probe
Probe
Coaxial probe
Seal

ProcessG3/4" male, G1" male, 3/4" NPT male, 1" NPT maleconnection
Display

Contents
Liquids, slurries, powders, granules (5 mm or less in diameter)
Time Domain Reﬂectometry (TDR)
Level, distance, volume, mass
Single cable probe ( Φ 2 mm) / 1 to 20 m / Liquids, slurries
Single cable probe ( Φ 4 mm) / 1 to 10 m / Powders, granules
Coaxial probe ( Φ 14 mm) / 0.73 to 4.07 m / Liquids ＊ 1
Top : 150 mm (coaxial probe), 200 mm (single cable probe)
Bottom : 50 mm (coaxial probe), 150 mm (single cable probe)
Length of dead zone depends on measuring conditions.
See Measuring Limits for details.
4 to 20 mADC or 3.8 to 20.5 mADC
±１μ A
22 mADC, 3.6 mADC, Fixed by parameter setting
R［Ω］≦（supply voltage ‒ 14V）/22mA. The allowable load resistance depends
on the supplied voltage. See Supply Voltage.
Liquid measurement : ± 20 mm (Less than 10 m), ± 0.2%/R.D. (More than 10 m)
Powder measurement : ± 40 mm
１ mm
±３ mm
10 m/min. (Depending on the measuring conditions)− 50 to ＋ 100℃
１00℃ /minute０kpa（abs）to 1.6Mpa
More than 1.6 for coaxial probe
More than 2.1 for single cable probe
5 mm or less in diameter
IP66 / IP67
− 40 to ＋ 80℃− 20 to ＋ 60℃− 50 to ＋ 85℃
2-wire loop-powered
Rated voltage : 24 V DC
Acceptable voltage : 14 to 30 V DC ＊ 2
M20 x 1.5 with waterproofed cable gland, 1/2" NPT female
０.5 to 1.5mm2
Aluminum
Stainless steel 316L
Stainless steel 316
Stainless steel 316L
EPDM

Display
Key padHousing including processconnection

Mass
Probe

LCD 128 x 64 pixels in 8-step greyscales
English, Japanese or others
4 buttons (right, enter, up, down)
３.3kg
Single cable probe Φ 2 mm：0.4kg/m
Single cable probe Φ 4 mm：1.2.kg/m
Coaxial probe : 0.45 kg/segment＊ 1 The coaxial probe will be shipped either in 73, 140, 207, 273, 340, or 407 cm length.
＊ 2 See the minimum power supply voltage for an output of 22 mADC at the terminal.

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TOKYO KEISO CO., LTD.

TG-L1015-0E

TGF1100

Micro Pulse Level MeterDIMENSIONS AND MASS
Converter

Converter with a coaxial probe

Converter with a Φ2 mmsingle cable probe

Converter with a Φ4 mm
single cable probe① Converter with a coaxial probe② Converter with a Φ 2 mm single cable probe③ Converter with a Φ 4 mm single cable probe④ The diameter of the outer sheath of the cable must be 6 to 12 mm for the cable entry M20 x 1.5.
Dimensions and mass
Probe typea

① Coaxial probe② Φ 2 mm single cable probe③ Φ 4 mm single cable probe

104
104
104

Dimension［mm］
b
141
141
141

Mass［Kg］

c
34
34
45

3.3
3.3
3.3

Probe

coaxial probe

Φ2 mm single cable probe

Φ4 mm single cable probe

Dimensions and mass
Probe type① Coaxial probe② Φ 2 mm single cable probe③ Φ 4 mm single cable probe

Lmin.
730 ＊ 11,000 ＊ 1
1,000 ＊ 1

Lmax.
4,070 ＊ 2
20,00010,000Dimension［mm］
m
15
100
100

t

Mass［Kg］

V
φ 21
φ14
φ 20

φ14
̶̶
̶̶

0.45 ＊ 3
0.4
1.2＊ 1 The probe can be cut in short on site.
＊ 2 The coaxial probe can be supplied in 6 standard lengths : Approx. 730, 1400, 2070, 2730, 3400 or 4070 mm.
＊ 3 This is the mass for each segment of the coaxial probe.

TG-L1015-0E

TOKYO KEISO CO., LTD.

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TGF1100

Micro Pulse Level Meter

MEASUREMENT LIMITS
①

②

③ ④

⑩

③ ④

⑦

⑦

⑧

⑧
⑩

⑨
⑪

⑨
⑤

⑪

⑤

⑥
⑥

⑦ Gas (Air)⑧ Product⑨ Probe length⑩ Tank height⑪ Minimum distance from the probe to a tank wall
Single cable probe : 0.3 m
Coaxial probe:0m① Converter with coaxial probe② Converter with single cable probe③ Top dead zone : Top part of the probe where measurement is
not possible④ Top non-linearity zone :Top part of the probe with a lower
accuracy⑤ Bottom non-linearity zone : Bottom part of the probe with alower accuracy⑥ Bottom dead zone : Bottom part of the probe where
measurement is not possible

Dead zone and non-linearity zone
Dielectric constant of product (Er)
Dead zone① Coaxial probe② Single cable probe

>40
Top ③

≦ 40
Bottom ⑥

150
200

Top ③
50
150

Bottom ⑥
200
250

200
150

（mm）
Dielectric constant of product (Er)Non-linearity zone
① Coaxial probe② Single cable probe

>40
Top ④

≦ 40
Bottom ⑤

300
450

Top ④
50
200

Bottom ⑤
350
500

50
250

（mm）
Start-up
The start-up indication will appear approx 5 seconds after power-on.
The measurement starts approx 30 seconds later. Further approx 10 seconds later the correct measurement starts. The necessary timeto get the correct measurement depends on the measuring conditions.
The current output becomes approximately 2.8 mA just after power-on, approx 10 seconds later 3.6 mA and after approx 30 seconds
later, it becomes correct output.
The necessary time to get the correct output depends on the measuring conditions.

4TOKYO KEISO CO., LTD.

TG-L1015-0E

TGF1100

Micro Pulse Level Meter

WIRING
Terminals① Signal (Power) cable（‒）② Signal (Power) cable（+）③ Grounding① ：Power supply③② ：Terminals at level meter③ ：Indicator or receiver

The stranded cable with 0.5 to 1.5 mm2 is recommended for the signal cable.
Strip the sheath of cable 5 to 7 mm in length and connect the conductor directly to terminals.
Install the signal cable apart from power lines.
Use a separate power source from other power equipment.
Using the shield cable is recommended.
Grounding the level meter and tank or silo when measuring powders or granules.
Connecting cable
Connect the conductor by inserting it through theterminals while pushing down the claw.
Push down the claw with your ﬁnger, not with a tool.
Too much strength might break the claw.
Check if the connection is secure.
Do not put the cable between the level meter andits cover during assembling them.

Power supply
Supply voltage: 14 to 30 VDC

Load resistance: See the graph.

Load resistance (Ω)

The minimum supply voltage for an output of 22 mADC at the terminal.

Supply voltage（V）

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TOKYO KEISO CO., LTD.

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TGF1100

Micro Pulse Level Meter

PRECAUTIONS ON INSTALLING OR USING TGF1100
Installation
Install it in the ambient temperature -40 to +80°C.
Provide a sun shade or cover to avoid the direct sunshine and rain splash if the meter is exposed to them.
Do not install the level meter in the place where a strong vibration is expected.
Decide the installation location and height considering the dead zone (non-measurable zone) of the TGF1100. The dead zone varies by
the probe to be used and operating conditions. See the section MEASUREMENT LIMITS.
Screw the TGF1100 into the threaded connection with a wrench by putting it around the hexagonal part of the meter, not rotating the
housing with your hand. It may be broken.

Installation on a non-metallic tank
Provide a metal sheet with 200 mm or larger in diameter as a reﬂection plate when installing it on the non-metallic tank like FRP. Without
the reﬂection plate the error may become larger or the measurement may be failed.
If you have a device with a coaxial probe, you can ignore these instructions.

① Non-metallic tank or pit② Metal sheet with 200 mm or larger
in diameter
Mounting on a pit or underground tank
Do not install the level meter directly on the thick concrete roof. Make a recess on the roof to install the metal plate and install the level
meter on it. See below.

Installing on a tank
Install the TGF1100 on the threaded connection (socket) which is ﬁxed on the roof of a tank. Do notmake a nozzle longer nor protrude it into the inside of tank. See below.

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TOKYO KEISO CO., LTD.

TG-L1015-0E

TGF1100

Micro Pulse Level Meter

Installing on a nozzle
Installation on the treaded connection (socket) is recommended. When installing it on the treaded connection (socket) on a flange withnozzle. Avoid a longer nozzle. The diameter of nozzle must be bigger or at least same as the height of nozzle: Nozzle diameter d ≥ nozzle
height h .
If this condition is not satisfied, a correct measurement cannot be expected or much longer dead zone is needed. Do not protrude thenozzle into the tank. See below.

h
h

d
d

Coaxial probe
Usage
Use the coaxial probe for the liquids less than 500 mPa•s or equal in viscosity as a rule. This type can measure the level or a distance tothe surface for tanks with smaller diameter or internal obstacles.

Precautions on using the level meter with a coaxial probe
・ This type has no restriction of the distance from tank wall or internal obstacles to the probe.
・ Do not put any foreign objects into the pipe of coaxial probe or do not adhere anything on the pipe.
・ Make the product get in or out of the pipe of coaxial probe freely.
・ The probe can be supported or ﬁxed at the intermediate section. However do not bend it.

・Do not install the probe near to a product inlet.

TG-L1015-0E

TOKYO KEISO CO., LTD.

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TGF1100

Micro Pulse Level Meter

Single cable probe Φ 2 mm
Usage
Use the single cable probe Φ 2 mm for the liquids less than 10,000 mPa•s or equal in viscosity as a rule. This type can measure the levelor a distance to the surface of liquids or slurries.
Precautions on using the level meter with a single cable probe Φ 2 mm
・ Keep at least a distance 0.3 m from the probe to a tank wall or internal obstacles.
・ Locate a counter weight above the bottom of tank. Do not make any slack of the cable or ﬁx the counter weight bottom of the tank withtraction of the cable.
・ If the ﬂuid in the tank is turbulent, ﬁx the tip of probe to avoid the sway. Do not make the probe get involved into the blades of agitator.
Place the probe a distance from the agitator or ﬁx the tip of probe inside tank.
・ Fix the probe only at the bottom of it if required so. If you ﬁx the probe at the intermediate point, you cannot measure the level under thatpoint.
・ Design the nozzle or installation location to keep a distance from the probe to the nozzle or to the wall of tank. See below.

a > 0.3m

・ Do not install the probe near to a product inlet.

8TOKYO KEISO CO., LTD.

TG-L1015-0E

TGF1100

Micro Pulse Level Meter

Single cable probe Φ 4 mm
Usage
The level meter with a single cable probe Φ 4 mm is used to measure the level or distance to the surface of the powders or granules withthe maximum 5 mm in diameter.
Precautions on using the level meter with a single cable probe Φ 4 mm
・ Install the probe for the powders and granules while the silo is empty. Fix the level meter without any slack of probe.
・ Design the threaded connection (socket) and the nozzle or decide the installation location so that the probe does not touch the wall oftank, socket or nozzle.
・ Keep the minimum distance 0.3 m from the counter weight and probe to the wall.
・ Fix the level meter to keep the counter weight at least 0.3 m above the bottom of silo.
・ Do not adhere anything on the threaded connection (nozzle) or inside of nozzle when the product is adherent.
・ Install the probe as far as possible from the internal obstacles to avoid the probe is entangled with them. The probe moves without ﬁxing it.

a > 0.3m
d > 0.3m

・ Do not install the probe near to a product inlet.

TG-L1015-0E

TOKYO KEISO CO., LTD.

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TGF1100

Micro Pulse Level Meter

Installation in standpipes (Stilling wells and bypass chambers)
Usage
Use a standpipe if the level meter is installed near the internal obstacles, agitators or product inlet.
The standpipe can also reduce the inﬂuence from the foams or bubbles by installing it internally as a stilling well or externally as a bypass
chamber.
Requirements for the stand pipe (Stilling well or bypass chamber)
The pipe must be metallic or electrically-conductive.
The pipe must be straight. The inside surface must be smooth with its roughness less than 0.1 mm.
There must be no sudden changes in internal diameter greater than 1 mm.
The Internal stilling well must have a vent hole at the higher point than the maximum liquid level.
The Internal stilling well must have enough gap between the counter weight and the inside of the pipe to make the liquids go througheasily.
Precautions on using the stand pipe (Stilling well or bypass chamber)
Place the probe in the center of the stand pipe.
The span of the bypass chamber must cover the maximum and minimum liquid levels: One nozzle must be higher than the max. level andanother lower than the min. level.
The liquids and gases must move smoothly to inside and outside the pipes.
The corrosion or adherence by ﬂuids inside pipe is not allowed.
Do not let any foreign objects into the pipe.
The lower zone than bottom of internal stilling well cannot be measured.

① Internal pipe (stilling well)② External pipe (bypass chamber)

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TOKYO KEISO CO., LTD.

TG-L1015-0E

TGF1100

Micro Pulse Level Meter

PROCEDURES FROM ASSEMBLING TO MEASURING
The probes of TGF1100 are delivered in following lengths:
Single cable probe Φ 2 mm : 20 m
Single cable probe Φ 4 mm : 10 m
Coaxial probe: Several segments as per speciﬁed

Cut and assemble the probe before installing it on the tanks as follows. However, see the instruction
manual for detail explanations on cutting and assembling.
・Adjust the probe length to the tank heightSingle cable probe

Coaxial probe

・Assemble the probe

・Installing the level meter on the tank
Follow the precautions on installation
・Connecting cableOpen the cover to connect the cable.
・Closing the cover and switching on the power
The start-up indication will appear approx 5 seconds after power-on.
The indication and output will start several tens of seconds later.
・Setting parameters
Setting parameters are carried out on the display of the level
meter.

ButtonFunction

Following parameters need to be set before measuring the level.

Normal mode : Enter the conﬁguration mode・Length of probe

Conﬁguration mode : Move the cursor to the right・Position at 4 mA output
・Position at 20 mA output

Normal mode : Change the measurement units
Conﬁguration mode : Enter, move to the upper layer

The correct measurement starts after thisNormal mode : Change the measurement namesetting.

Conﬁguration mode : Decrease value or change parameter
Normal mode : Change the measurement nameConﬁguration mode : Increase value or change parameter

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TGF1100

Micro Pulse Level Meter

APPLICATION TABLE FOR PROBE SELECTION
Probe type

Coaxial probe

Single cable probe

Single cable probe

φ１4mm
4m

φ２mm
20m

φ４mm
10m

Liquids>1.6

Liquids, Slurries>2.1

Powders, Granules
>2.1

×

○

―

○

○

―

―
―

―
―

○
○

○
×
○
○

○
×
○
○

×
○
―
―

Max. measuring range
Measuring objects
Measuring material
Dielectric constantLiquids less than 10,000 mPa • s or equal inviscosity ＊ 1
Liquids less than 500 mPa • s or equal inviscosity ＊ 1
Powders
Granules (Less than 5 mm in diameter)
Installation method and place
Storage tankSilo
Bypass chamber
Stilling well
＊ 1 A general guidance to select the probe○：Suitable, ×：Not suitable, ―：Not applicable

MODEL AND SPECIFICATION CODES
Speciﬁcation VF25
codes
Fixed code
Housing material

4 1

0

4

Description
Always 4

1

Aluminum alloy
Stainless steel 316, Single cable probe Φ 2 mm, Counter weight Φ 14 mm x 100 mm, 20 m, forliquids
Stainless steel 316, Single cable probe Φ 4 mm, Counter weight Φ 20 mm x 100 mm, 10 m, forpowders and granules
Stainless steel 316L, Coaxial probe Φ 14 mm, 1 segment (probe length max. 73 cm)

3
TGF1121
6

Probe type/A
Weight shape/
B
Probe material/
C
Probe length
TGF1131D
E
F

Stainless steel 316L, Coaxial probe Φ 14 mm, 2 segments (probe length max. 140 cm)
Stainless steel 316L, Coaxial probe Φ 14 mm, 3 segments (probe length max. 207 cm)
Stainless steel 316L, Coaxial probe Φ 14 mm, 4 segments (probe length max. 273 cm)
Stainless steel 316L, Coaxial probe Φ 14 mm, 5 segments (probe length max. 340 cm)
Stainless steel 316L, Coaxial probe Φ 14 mm, 6 segments (probe length max. 407 cm)

2
3
5
6

Process connection

G3/4″Male (ISO228)
G1″Male (ISO228)
3/4″NPT Male
1″NPT Male

1
2

Cable entry

M20 x 1.5 with water proof plug
1/2″NPT

1
2

Display unit

Without display unit
With display unit

0
1
7

Display language
Fixed code

Without display
EnglishJapanese0 Always 0

STANDARD ACCESSORIESORDERING INSTRUCTIONS

A sheet of setting data

Specify the following when ordering for example:

An instruction manual

Model code

A tool to open the coverSpeciﬁcation code : VF254133121: TGF1121
Single cable probe Φ 2 mm with G1 male

* Specification is subject to change without notice.

Head Office : Shiba Toho Building, 1 – 7 – 24 Shibakoen, Minato-ku, Tokyo 105 – 8558
Tel : +81-3 – 3431 – 1625 (KEY) ; Fax : +81-3 – 3433 – 4922
e-mail : overseas.sales@tokyokeiso.co.jp ; URL : http://www.tokyokeiso.co.jp
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