NDA Bourdon tube pressure switchDetailed product description：

The NDA Bourdon tube pressure switch relies on a Bourdon tube (brass, 403 stainless steel) to drive a mercury switch or quick switch.
NDA is a dead zone adjustable type. The NDA switch has two external regulators, one for setting the high voltage operating point and the other for setting the starting point. The dead zone, which is the difference between the set point and the starting point, is adjustable throughout the entire process, and the adjustment or setting of the switch is indicated by two pointers.
Any working range dead zone can be adjusted to the minimum. The set point can be adjusted without opening the instrument panel cover or in an interrupted state. Calibration is visible, and switch status is visible.

Usage
Set working point: The NDA pressure switch has two external adjustable levers. The left adjustment lever is used to set the starting point, and the right adjustment lever is used to set the high-pressure working point. There are control hands on the dial, and the scale value aligned with the pointer on the adjustment rod is the set value. The scale on the dial has a certain degree of accuracy. Please adjust the pointer to the correct scale value, and generally do not require calibration with measuring equipment. Whether it is the first time changing the set value or changing the set value in an online workspace, only two pointer positions need to be adjusted.

Technical specifications of NDA Bourdon tube pressure switch

Ambient temperature	-40℃—70℃
Medium temperature:	-Higher operating temperatures between 40 ℃ and 150 ℃ require the use of storage pipes
Pressure interface:	M20 x 1.5 or adapter to 1/4NPT 1/2NPT
Shell:	Pressed aluminum, transparent cover
Line connection:	3 bolt type
Wet material:	Compatible with Bourdon tube material, brass and stainless steel
Maximum pressure:	Adjust the working range to the maximum
Work point setting:	Passive self calibration
The switch action is visible:	visible
Sensor:	Mercury switch
Capacity:	220VAC/10A—15A
Installation:	Vertical and horizontal installation
Set precision:	±2%
Repetitive error:	±0.5%
Dead zone:	Continuously adjustable
lifespan	5-10 years

Bourdon tube	adjustable range		Mercury switch SPDT dead zone adjustable type
material	PSi	MPa	Minimum Dead Zone PSIG	model
BRASS copper	-760mm HG-O vacuum gauge	2"Hg	one	NDA-31-2*
	1/8-15	zero point one zero	one	NDA-31-1
	1/8-20	zero point one six	one	NDA-31-3A
	1-35	zero point two five	one point seven five	NDA-31-4
	2-60	zero point four zero	three	NDA-31-5
	5-100	zero point six zero	three point seven five	NDA-31-6
	5-150	one	six	NDA-31-7
	10-240	one point six zero	eight	NDA-31-8
	10-375	two point five zero	fourteen	NDA-31-9
	30*-600	four	25*	NDA-31-10
	30*-900	six	30*	NDA-31-11
403SS stainless steel	5-100	zero point six zero	six	NDA-21-6S
	10-240	one point six zero	eight	NDA-21-8S
	10-375	two point five zero	fourteen	NDA-21-9S
	25-600	four	twenty-five	NDA-21-10S
	100-1500	ten	ninety	NDA-21-12S
	500-5000	forty	four hundred and fifty	NDA-21-15S
not mark quantity Cheng	-60.0		*	*
	-100.0		*	*
	-120.0		*	*
	-160.0		*	*