Flush Diaphragm Material Ceramic Piezo-Resistive Pressure Sensor for Refrigeration Equipment

• Type: Piezoresistive Pressure Sensor
• Component: SemiConductor Type
• For: Diffused Silicon Pressure Transmitter
• Output Signal Type: Analog Type
• Production Process: Integration
• Material: Stainless Steel
• Model NO.: 501
• Wiring Type: Four-Wire
• Measuring Medium: Liquid
• IP Rating: IP68
• Certification: RoHS
• Customized: Customized
• Transport Package: Foam+Carton
• Specification: dia. 19mm
• Trademark: Runpaq
• Origin: China

Product Description

Flush Diaphragm Material Ceramic Piezo-Resistive Pressure Sensor for refrigeration equipment

Brief Introduction
Flush diaphragm ceramic pressure sensors are made with a ceramic base plate and a flush diaphragm and work following the piezoresistive principle. The Wheatstone bridge is screen printed on one side of the flush ceramic diaphragm which is, in turn, glued to the sensor's body. The bridge faces the inside where a cavity is made and the diaphragm's opposite side can therefore be exposed directly to the medium to be measured.Because of the Al2O3 ceramic excellent chemical resistance (aggressive gases, most of solvents and acids, etc.),
no additional protection is normally required.
Ceramic pressure sensors are thermally compensated by laser-adjustable PTC resistors and the use of ceramic ensures a high linearity across the entire range of measurement, reducing effects of hysteresis to a minimum.
 

Applications	Key features & advantages
• Cooling equipment & A/C system • Automotive and vehicle • Industrial process control • HVAC system • Refrigeration equipment • Air conditioning unit	• Pressure range 0.5bar‐800bar • Excellent resistance to corrosion and abrasion • Absolute measurement available • Thermally compensated • Extended customization • Extended choice of measuring ranges

 
Technical parameters

Parameter	Unit	Description
sensor type	-	flush diaphragm, absolute (A), gauge (R) or sealed gauge (S)
technology	-	piezoresistive
diaphragm material	-	ceramic Al2O3 96% (standard), 99.6% or sapphire (on request)
weight	g	< = 8 (ceramic cell only)
response time	ms	<= 1
supply voltage VDC	VDC	2...30
offset	mv/v	-0.1 ~ +/-0.1 (other nominal values available on request)
current cons.	mA	< = 1.3 @ 10V
operating temperature	°C	‐40...+135 (‐40 °F...+275 °F)
storage temperature	°C	‐40...+150 (‐40 °F...+302 °F)
impedance	kΩ	11+/- 30%
nominal pressure FSO	bar	0.5	1	2	5	10	20	50	100	200	400	600	800
	psi	7	14	29	73	145	290	725	1450	2900	5800	8700	11600
overload pressure	bar	1	2	4	10	15	35	100	150	350	500	750	1000
	psi	14	29	58	145	217	507	1450	2175	5075	7250	10875	14500
burst pressure	bar	2	3	6	15	25	65	120	200	500	650	950	1250
	psi	29	43	87	217	362	942	1740	2900	7250	9425	13775	18125
vacuum capability	bar	-0.1	-0.5	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1
	psi	-1.4	-7	-14	-14	-14	-14	-14	-14	-14	-14	-14	-14
type	-	R	A/R/S	A/R/S	A/R/S	A/R/S	A/R/S	A/R/S	S	S	S	S	S
total thickness	mm	6.15	6.17	6.23	6.30	6.35	6.55	6.70	6.70	7.05	7.32	7.55	8.05
	in	0.242	0.2432	0.245	0.248	0.250	0.258	0.263	0.263	0.278	0.288	0.297	0.317
sensitivity 2	mv/v	1.4-2.4	2.0-3.6	2.3-3.5	2.3-4.0	3.1-5.5	2.4-4.0	4.0-6.0	3.0-4.8	2.5-3.9	3.1-4.8	3.1-4.8	2.0-3.5
accuracy 3	%/fs	0.4/0.9	0.3/0.9	0.3/0.6	0.2/0.4	0.2/0.5	0.2/0.5	0.2/0.5	0.2/0.5	0.4/0.9	0.5/1.0	0.5/1.0	0.5/1.0
thermal offset shift(typ./max)	%/fs/k	± 0.005 / ± 0.040 25 °C...85 °C (77 °F...185 °F)
thermal span shift	%/fs/k	≤ ± 0.010                          0 °C...70 °C                                                    (32 °F...158 °F) ≤ ± 0.012                          -25 °C...0 °C / 70 °C...85 °C                          (-13 °F...32 °F / 158 °F...185 °F) ≤ ± 0.014                          -40 °C...-25 °C / 85 °C...135 °C                     (-40 °F...-13 °F / 185 °F...275 °F)
reliability tests 4	-	1000 hours @85 °C (185 °F) & 85 %RH 500                       thermal shocks ‐40°C...+150 °C (‐40 °F... +302 °F) 1000 hours burn‐in @150 °C (302 °F)                                  10 million 0 bar to Pnom pressure cycles

Tests performed at 25°C in Metallux housings, unless otherwise specified. Different housings may affect performances.
1. Psi values for reference only.
2. The sensitivity of each production batch is constant, within the indicated range and with minimal dispersion.
3. Accuracy =√NonLinearity2+Hysteresis2 +NonRepeatability2, terminal based.
4. All technical characteristics will remain within indicated ranges performing the above-mentioned reliability tests.

Drawing & wiring diagram

Dimensions

Model selections

Note: 1. Extremely attention must be paid to sensor installation process to avoid any miss conduction that affect the sensor performance,
2. please protect the diaphragm and the compensated board carefully to prevent any damage. 3.  Please contact us if your requested working
temperature lower than -20ºC