A specially shaped tuning fork is kept vibrating using piezo-electric elements. The oscillation of the fork damps when in contact with the material. The loss of oscillation amplitude is detected and used for switching a relay. The output contacts of the relay are in turn used for annunciation and/or control.
Low Power Consumption: Less heat, Long life
Independent of material’s electrical properties
Fast switching
Self-diagnosis
Resonant frequency varies with the length of tines:
| Fork Length(mm) | Min. Probe Length(mm) | Frequency(Hz) |
|---|---|---|
| 185 | 200 | 150 |
| 100 | 135 | 350 |
Extensible probe length from 135 mm
135mm, 185mm – up to 3m
W: Weatherproof
P5:IP-65 Weatherproof housing
FA:Flame-proof for Gas Groups IIA and IIB
FC:Flame Proof for Gas Group IIc
Threaded Mounting: 1-1/2”, 2” BSP/NPT
Flanged Mounting: As per specification
Pipe- GI/SS : 200mm – 3000mm
Extension Length: + 135mm/185mm
S4: SS-304
S6: SS-316
PT: PTFE Lined
HL: Halar Lined
HC: Hastelloy C
A (Ambient): below 100°C
H (High temperature): 100°C – 150°C
D: Universal Power Supply 18-55 V DC, 90-265 V AC, Single-point two potential free relay outputs rated at 6A
S: Universal Universal Power Supply 18-55 V DC, 90-265 V AC
(1.) Singe-point – Single relay (Rated 6A)
(2.) Open-collector PNP output, max 100mA non-inductive load
M: 24VDC – 8/16 mA 2-wire Loop powered current output
N: 8.2V Namur type current output (ION = 2.2 … 2.5 mA, IOFF = 0.8 … 1.0 mA)
____mW
Field selectable (through toggle switch)
Open: Fail-safe High, Close: Fail-safe Low
0.8s Cover Delay
1s Uncover Delay
Cover and Uncover Delay: 0.8s / 1s to 20s, through toggle switches
Field Selectable (through toggle switches)
For all Industries requiring level limit detection in free-flowing solids including:
Powders, sand, sugar
Pulverized coal
Food grains
Cement
Granular material
2 LED’s
Red: Alarm, Green: Normal