Turning fork switch from premier instrument
Turning fork switch from premier instrument
SF300 the (n) intelligent tuning fork switch works, the fork is excited by a piezoelectric crystal to make the fork in a resonant state. when the fork is in contact with the material, the resonant frequency will change significantly. An internal electronic unit is converted to a relay or PNP switch output after processing by detecting the fork frequency.
SF300(n) intelligent tuning fork switch is equipped with a variety of durable stainless steel tuning fork body, can carry on the material level inspection to the storage tank or the pipeline, suitable for all kinds of liquid, powder, granular solid, can be installed on the pipe or storage tank by thread, flange, or through sanitary connectors installed in food industry facilities.
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Supply voltage:
~30 VDC
110~220 VAC( relay output only)
Output
Relay DPDT 8A 250VAC
PNP output :50 mA ,24V
Frequency output: equal to fork vibration frequency (24 V)
Temperature :-30~70C
Medium operating temperature:
Short fork :-30~ 150C
Long fork :-30~250C
Density range:
Liquid ≥600 kg/m3
Solid powder density： ≥100 kg/m3
Liquid viscosity :0.2~ 10,000 cp
Switch delay :0~255 seconds adjustable
Alarm mode (user set):
wET wet alarm (fork contact material alarm)
dry Dry Alarm (Fork Out of MaterialAlarm)
Lag (water): ± 1 mm
Switch point (water):
short fork: distance from the end of the tuning fork (vertical):13 mm
Long fork: a dot on the side of the fork
Maximum operating pressure : ≤1 Mpa
Connection mode:
Thread :3/4" NPT
Threads: G1/2
Flange (user specified)
Sanitary Connectors: Fittings :2"(51 mm) Tri-Clamp Connector , 1" BSPP (G) O- ring Seal Material:
Shell Material: Die-cast Aluminum Alloy
Fork material:
316 stainless steel
316 stainless steel, Teflon surface
Shell Protection Level: IP65
Explosion-proof class: EX d II CT6.
Fork vibration frequency:
Short fork :1400±50 HZ
Long fork :330±50 HZ
Environmental Vibration Level: Acceleration not greater than 1 g
