tuning fork switch

Tuning fork switch is a new type of level switch. The tuning fork is excited by the crystal to vibrate. When the tuning fork is immersed in liquid or solid, the vibration frequency changes. This frequency change is detected by the electronic circuit and outputs a switching value. Tuning fork level switches are also called electrical floats. Electrical floats can be used wherever float switches are used and where float switches cannot be used due to structure, turbulence, agitation, bubbles, vibration, etc. Since this level switch has no moving parts, it requires no maintenance or adjustment. It is an upgraded product of the float switch.
Tuning fork switches are widely used in tap water, mineral water, pulp, glue, dyes, mud, alkali solutions, acid solutions, beer, beverages, petrochemicals, light industry, food, water treatment, liquids that can produce gas, and fluidity Good solid powder or granules. Provide upper and lower limit alarm and control for material level.
Features of the tuning fork switch:
Strong adaptability: Different electrical parameters and densities of the measured medium have no effect on the measurement. Fouling, agitation, turbulence, bubbles, vibration, medium viscosity, high temperature, high pressure and other harsh conditions have no effect on the detection
. No adjustment is required: because the detection of the tuning fork level switch is not affected by the electrical parameters of the measured medium and the Due to the influence of density, no on-site adjustment is required no matter what kind of medium is measured
Maintenance-free: Since the detection process of the tuning fork level switch is completed by an electronic circuit and has no moving parts, it does not need to be used once it is installed and put into use. maintain.
Technical parameters of tuning fork switch:
, Power supply voltage: or
, Working temperature: fork body ~℃
, Ambient temperature: ~℃
, Working pressure
, Medium density:
, Output mode: relay output (,)
, Output delay: ~ second adjustable
, Power consumption:
, High and low alarm: on-site Set to (high alarm mode) or (low alarm mode)
, electrical interface:
, process connection: threaded installation (standard, optional B), flange installation (optional)
, Shell protection
, Explosion-proof mark: Ⅱ.
Protection when using the tuning fork switch:
The feed hole cannot be directly aimed at the tuning fork. If it cannot be avoided, in order to prevent the compacted large pieces of material from falling on the tuning fork, a protective plate must be installed above the tuning fork. , or add a protective cover to avoid damaging the fork body. If the material is transported by wind, a windproof board can be installed.
In situations where the vibration is strong, the fork can be hoisted with a rope (must be specially ordered).
Do not install the instrument in a place exposed to direct sunlight. If exposed to direct sunlight, a heat shield can be installed.
When installing the casing, make sure the cable outlet hole faces downwards, and seal it with a rubber ring to prevent water droplets from penetrating into the casing.
Instructions for use of tuning fork switch:
Before use, check the operation and delay of the instrument. Only when it is correct can it be put into operation.
The instrument should be checked regularly and sediments on the fork body should be removed.
The grounding wire should be in good contact with the container wall or the earth, and the grounding resistance should be <.
The tuning fork limit switch is usually installed side-mounted and installed on the side wall of the bin body to detect the upper and lower limit positions of the material height. When the bin body is inconvenient to open holes on the side, it can be top-mounted. The position selection can avoid the impact of the material level. s position.
Instructions for ordering tuning fork switches:
, please indicate the parameters according to the selection mark
, also indicate the medium name, temperature, pressure
, when measuring the material level, please indicate Material name, particle size and capacity
If you choose other flange standards, please indicate the standard number
Please indicate whether a flange protective cover or protective plate is required.
Notes on the installation of the tuning fork switch:
When installing on the side, the installation mark must be vertically upward or downward. The probe head must be tilted downward about ℃. When installing the pipe, the direction mark must point in the same direction as the pipe.