Vertical Water Level Recorder "ALPHA"
First of all, this instument serves for the continous control of liquid levels. It is very robust and registrates with high accuracy. Mainly it is used for:
ground water studies
water supply
discharge measurement
irrigation
sewerage
advantages:
digital indication
modular system
outdoor installation without protectionhousing
suitable for groundwater tubes of 2"
switch-selected recording scales
tilting mechanism
additional temperature registration ispossible (type ALPHA-T)
datalogger can be installed
technical data
description
attractive case made of special-aluminium cast with weather-proof hammerscale-lacquer;solid door or with inspection window; ventilation with temperature compensation; safety-lock; float-wheel axle with double ball-bearings
indication
The measuring instrument is equipped with a digital instantaneous indication. The respective waterlevel can be read in m and cm. (fig. 1)
writing device
The writing slide will be lead along a metal bar up-and downwards. The registration will be effected with capillary-or fibre pens.
registration drum
122 mm .; drum circumference 384 mm, usable writing height 250 mm.
additional equipment
The measuring instument is also available with tilting mechanism. This enables, to tilt the instrument and using the observation tube for control measurements or for taking water samples.(fig. 2)
installation
For installation of the registration gauges to observation tubes, special threaded fixing flanges are available.
Sizes (.): 2", 3", 4", 5", 6" and 8"
(further sizes on request)
On request fixing tubes with flange and ventilation in different sizes are available.
dimensions
case: 225 x 205 x 510 mm
case ground-area: 206 x 200 mm
weight
17 kgs (gross)
incl. maintenance material
Strip Chart Water Level Recorder "DELTA"
The strip chart water level recorder "DELTA" serves for continuous registration of water levels in flowing and stagnant waters.
The registration will be effected on a 16 m long diagram roll.
Mainly this instrument will be used for:
discharge measurement
irrigation
ground water studies
advantages:
long-term measurements,
maintenance-free
digital indication
changeable paper speed
reversing spindle
outdoor installation
simple installation
modular system
For outdoor installation, the instrument can be delivered with solid door (fig. 5) and protection cover for the float wheel, float cable and return pulley.
For mounting on tubes, flanges with . 4", 5" and 6" are available. inkl. Wartungsmaterial
technical data
description
attractive housing made of special aluminium cast with weather-proof hammerscale lacquer; solid door or with inspection window; ventilation for temperature compensation; safety-lock, float- wheel on ball-bearings.
indication
4-digit counter for digital indication in m and cm; range 0 - 99 m.
writing device
reversing spindle for recording high- and low water level peaks with capillary- or fibre pens. On request also pencil - or waxpaper writing possible.
strip chart unit
usable writing width 250 mm
diagram roll
normal paper or ceramic coated
clockwork
The instrument can be equipped with mechanical orquartzdriven clockwork.
quartzdriven clockwork (battery-operated)
operation period: approx. 500 days
paper speed: 2-5-10-20 mm/h*
(*other paper speeds on request)
dimensions:
weight:
16 kgs (gross)
incl. maintenance-material
measuring ranges
As standard version, three recording scales are installed (second version mentioned in brackets) which can be selected by lateral moving of the gears.
registration measuring float
scale range[m] from Ø
1: 5 (1:10) 1,25 ( 2,50) 90 mm
1:10 (1:20) 2,50 ( 5,00) 90 mm
1:20 (1:40) 5,00 (10,00) 90 mm
By simple exchange of pairs of tooth gears, following registration scales are possible:
registration measuring float
scale range[m] from Ø
1: 2,5 0,625 150 mm
1:30 7,50 90 mm
1:50 12,50 90 mm
on request registration scales up to 1 : 200 are possible
option
easy adaption of a datalogger for parallel digital registration of water level fluctuations (e.g. type MDS-Insider DIGI)
Accessories
reversal indication
The SEBA strip chart recorder "DELTA" can be equipped with a reversal indication (2nd writing pen at the left paper border). So it is possible to determine the tendency (falling or increasing water level) at the reversal.
tele-transmission
All SEBA water level recorders ("ALPHA", "XI", "DELTA") can simply be equipped for teletransmission of water levels. Both, long-distance indication, as well as remote registration are possible.
parameter versions:
potentiometer
transformer with current output 0-20 mA
encoder
On request the instrument can also be equipped with limit switches for steering purposes.
in case of order, please indicate following
ALPHA XI-Pegel DELTA
1 solid door or with inspection window √ - √
2 with or without tilting mechanism √ - -
3 digital indication for groundor √ - √
surface water
4 registration scales/measuring ranges √ √ √
5 quartzdriven or mechanical clockwork √ √ quartzdriven only
6 drum rotation/paper speed √ √ √
7 fibre-or capillary pens √ √ √
8 size for fixing flange √ - √
9 length of float cable √ √ √
10 accessories √ √ √
measuring ranges
As standard version, three recording scales are installed (second version mentioned in brackets) The scales are adjustable by lateral moving of the gear bloc.
registration measuring float
scale range [m] from Ø
1: 5 (1:10) 1,25 ( 2,50) 75 mm
1:10 (1:20) 2,50 ( 5,00) 75 mm
1:20 (1:40) 5,00 (10,00) 75 mm
By simple exchanging a pair of gears the following measuring ranges are possible:
registration measuring float
scale range[m] from Ø
1: 1 0,25 m > Ø 200 mm
1: 2 0,50 m Ø 150 mm
1:15 3,75 m Ø 75 mm*
1:25 6,25 m Ø 75 mm*
1:30 7,50 m Ø 75 mm*
1:40 10,00 m Ø 75 mm*
In case of recording scales 1:50 - 1:200 the gear pairs are mounted separately.
* in case of perpendicular observation tubes also floats of 40 mm Ø are possible. Depending on the tube, we recommend to use the greatest possible diameter for the float!
clockwork
The instrument is available with mechanical or with quartzdriven clockwork. They can be exchanged by loosening two screws.
mechanical clockwork (hand wound)
drum paper operation
rotation speed period
4 days* 4 mm/h 32 days
8 days* 2 mm/h 32 days
16 days* 1 mm/h 32 days
32 days* 12 mm/day 32 days
* reversible by exchanging one gear pair
quartzdriven clockwork
battery-operated (3V)
accuracy +/- 60s/year
4 drum rotations (selectable by switch)
drum paper operation
rotation speed period
1 day 16 mm/h
8 days 2 mm/h 500 days
32 days 12 mm/day (approx.)
96 days 4 mm/day
other drum rotations are available on request (1 hour to 196 days)
variations
Vertical-Water Level Recorder "ALPHA-U"
For recording high and low water level peaks, this instrument is equipped with a reversing spindle (fig. 3). Therefore, floats with > 75 mm Ø are necessary.
Vertical-Water Level Recorder "ALPHA-T"
This instrument serves for the simultaneous control of water level and -temperature. The temperature module can be later installed into our reliable water level recorder "ALPHA".
It`s also available with temperature registration only, as version "ALPHA-TS".
Vertical Water Level Recorder "ALPHA" with datalogger "MDS-Insider"
"MDS-Insider" and measuring converter will be installed into the "ALPHA"-housing. This ensures a simultaneous analogue (mechanical) and digital (computer-compatible) recording of measuring data.
Horizontal Water Level Recorder "XI"
The measuring instrument serves for continuous control and registration of water level fluctuations in flowing and stagnant waters.
The application of this very reasonable instrument type requires a protection housing!
advantages:
extremely smooth running
selectable recording scales
reversing spindle for registration of highand low water level peaks
simple and quick installation
technical data
recording drum
horizontal positioned;Ø 122 mm;
drum circumference 384 mm;
writing width 250 mm
dimensions
writing device
Reversing spindle for recording high- and low water level peaks with capillary- or fibre pens.
weight
approx. 14 kgs (gross)
incl. maintenance material
option
easy adaption of a datalogger for parallel digital registration of water level fluctuations (e.g. type MDS-Insider DIGI)
measuring ranges
This instrument is supposed to be equipped with five standard registration scales - according to the requirement. Adjustment to another measuring range will be effected by simple exchange of the float wheels.
recording measuring float
scale range[m] from Ø
1: 1 0,25 90 mm
1: 2 0,50 90 mm
1: 5 1,25 90 mm
1:10 2,50 90 mm
1:20 5,00 90 mm
other registration scales on request
clockwork
The instrument is available with mechanical or with quartzdriven clockwork. They can be exchanged by loosening two screws.
mechanical clockwork (hand wound)
drum paper operation
rotation speed period
4 days* 4 mm/h 32 days
8 days* 2 mm/h 32 days
16 days* 1 mm/h 32 days
32 days* 12 mm/day 32 days
* reversible by exchanging one gear pair
quartzdriven clockwork
battery-operated (3V)
accuracy +/- 60s/year
drum paper operation
rotation speed period
1 day 16 mm/h
8 days 2 mm/h 500 days
16 days 1 mm/h (approx.)
32 days 12 mm/day
other drum rotations are available on request (1 hour to 196 days)
Producing Area：Germany