The gauge features: resistance to environmental vibrations and withstanding pulsation of medium and loading's striking. The instrument displays clearly and stably, sends reliable signals. This gauge is suitable for measuring pressure of gases, liquids not corroding the copper and alloy of copper. Except indicator function, it has equipped with a maximum and minimum variable signal control.
The gauge adopts photoelectrical sensor. Constitute contact less signal convertible equipment. Signal first is through control electric circuit, and then is outputted by high sensibility relay. So the instrument's sensibility is very high, responds quickly and control's precision is high. It has no laggardly leap phenomena.
Under low voltage working, normal contact equipment immerses into damping liquid, its contact adheres to oil membrane, that is increasing resistance, can't make contact function effectively, and high current makes burning down serious. Because of adapting photo electricity contact less electric contact signal convert, and no electric arc, and no contact corrosion phenomena, the instrument has a long life. Switch features are good: under 24V operational voltage, it still can operational reliable and safely.
This type gauge has patented a practical use new pattern technology, patent number: 99229277.8. The gauge can be suitable for special environment, various kinds operational conditions.
It was widely utilized in petrol, chemical, mechanic, metallurgy, nuclear energy technology and frequent switch technological process.
Serial code:

Specification：

Indicative instrument	Scale range MPa		(-0.1～0.15，? -0.1～0.3， -0.1～0.5， -0.1～0.9， -0.1～1.5， -0.1～2.4) 0～0.16，0～0.25，0～0.4，0～0.6，0～1，0～1.6，0～2.5，0～4，0～6，0～10，0～16，0～25，0～40，0～60
	Accuracy		± 1.6%
	Operational temperature		-15℃～55℃
	Operational maximum content		1/2～2/3
	Resistant operational environmental vibration		V.H.4
	Safeguarding grade		IP64
	Operational voltage		DC9V
	Outputting lineresistance		<120Ω
Controller	Outputting contact loading	The maximum voltage of switch	AC 250V DC 220V
		The maximum operational current	1A
		The maximum control-content	30VA
		Electric life	10⁵
	Operational condition	Voltage	AC220V DC12～24V
		Power	2.2VA
		Environmental temperature	-10℃～40℃
		Relative humidity	10%～75%

Design： Q/320211 DGH06-2003

Dimension：
Indicative instrument dimension：

Model	Dimension mm
Model	D₁	D₂	L₂	L₁	H	d	d₀	M
YXD-100ZQ	100	98	23	78	38	118	5.5	20×1.5
YXD-100Z	100	98	28.5	78	38	/	/	20×1.5
YXD-100	100	98	28.5	78	38	/	/	20×1.5
YXD-150	150	161	35	90	42	/	/	20×1.5

The best connecting line of indicative instrument and controller is 7×0.1-5 cable line ( external diameter Φ5 )

Contact's switch mode：

Indicative instrument's established mode		Controller equivalent
Contact's switch mode	Diagram	Connecting schematic diagram	Specification
The maximum and minimum content			walking up: When exceeding established value, the lower limit is cut→the upper limit put through Walking down: When exceeding established value, the upper limit is cut→the lower limit put through
The double maximum content			Walking up: When exceeding established value, the first upper limit is put through → the second upper limit is put through again. Walking down: When exceeding established value, the second upper limit cut→the first upper limit cut next.
The double minimum content			Walking down: When exceeding established value, the first lower limit is put through→ the second lower limit is put through next Walking up: When exceeding established value, the second lower limit is cut → the first lower limit is cut next.

Connecting schematic example：
? When pressure is under the lower limit's value, J₃ is supplied electric, the main engine operates. When pressure is up the upper limit's value, J₃ isn't supplied electric, the main engine halt to operate. When pressure is dropped to the lower limit's value, J₃ is supplied electric again, the main engine operate.
U allows DC12-24V, YXD-100D style
AC220V, YXD-100A style
The upper and lower connecting schematic diagram example

Ordering：
Operational environment should not contain any corrosive gas.
After connecting and installing, please shear the jut of rubber stopper on the instrument shell, equate the pressure inside the instrument cavity with the atmosphere, in order to assure the gauge's accuracy.
When ordering, please specify name, model, scale range, operational voltage.
Please make separate specify corrosive environment and corrosive medium.
When operational power is 24VDC, please use safety power or supply power separately, don't use the 24VDC power with output inductance load.