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產(chǎn)品簡(jiǎn)介

SA CAPACITANCE LEVEL SWITCH

詳細(xì)介紹

sa capacitance level switch

principle

the capacitance level sensor measuring principle is based on the physical properties of a capacitor formed by the sensor and the vessel wall, the electric capacity is affected by the dielectric value of products. when the sensor is not covered, the dielectric constants =1 (air is usually =1) when the sensor is covered, the dielectric constant will increase in capacity, the electronic oscillator (1 mega hz radio frequency) will cr-eate a resonating signal, which will turn the unit on or off for level control purpose.

features and applications

because the capacitance level sensor has no moving parts inside the device, it is will not be affected by friction. it is suitable for powder or liquid application easy to install. the customer can choose the types below to suit his requirements.

1. standard type(sa110 & sa111 a/b/c ) suitable for general use.

2. hi-temp type (sa120 & sa128 a/b/c) suitable for high temperature environment.

3. corrosion-proof type (sa130 & sa132 a/b/c) suitable for corrosive environment.

4. remote probe type(sa140 a/b/c)or use with vibrator equipped tank.

5. wire-probe type(sa150 a/b/c) suitable for silo or deeper tank.

6. plate-probe type (sa160 a/b/c)suitable for granules and at lower position of tank side.

7. explosion-proof type (sa170d ~ sa178d)with sa-75u can be use in hazardous areas.

8. anti-static type(sa180 & sa181 a/b/c) suitable for electrostatic environment (it won"t be damaged by the electrostatic discharge)

standard type

dimension
model	sa110 a/b/c [ standard type ]	sa111 a/b/c [ standard type ]	sa120 a/b/c [ hi-temp. type ]
operating temp.	-20℃~80℃
probe material	sus 304
insulated material	upe		ptfe
connection	1"pt screw (sus)
sensitivity range	10pf (std.) ,20pf, 40pf option
weight	approx. 1.9kg		approx. 2.4kg
housing spec.	aluminum ip65
supply voltage	110/220vac±10% or 24vdc
delay time	0~6 seconds
power consumption	2w
contact rating	5a/240vac or 5a/30vdc, spdt or npn 100ma

if length of sensing probes longer than 3 meters, please chose 20pf or 40pf sensitivity type.

standard type

dimension
model	sa130 a/b/c [ corrosion-proof type ]	sa150 a/b/c [ wire-probe type ]	explosion proof sa170d (with sa-75u) [ standard type ]
operating temp.	-20℃～80℃
probe material	sus 304 wetted part: pp coating	sus304 cable	sus 304 / sus 316
insulated material	upe		ptfe or upe
cennection	1-1/2"x10kg/cm flange (pp)	1″pt screw (sus)
sensitivity range	10pf (std.)	10pf、20pf、40pf	10pf (std.) 20pf, 40pf option
weight	approx. 2kg	approx,4.1kg	approx. 1.9kg
housing spec.	aluminum ip65
supply voltage	110/220vac or 24vdc		16~24vdc
delay time	0～6 seconds
enclosure protection			ex (ia) iic
power consumption	2w
contact rating	5a/240vac or 5a/30vdc, spd or npt 100ma		npn 100ma