Varies Ranges : from 0 to 150 mm Wc up to 0 to 600 Bar Differential (Dead Band) : Fixed (Within 10% of set value) Temperature Range : -10 to 80 Degree C (for high temperature use of impulse tube is advisable) Accuracy : +/- 1% to 2% FS No. of Switches : one no. or, two nos. Type of Switches : Micro Switches - SPDT Sensing Element : Diaphragm (PTFE or Neoprene or SS 316) or Piston Enclosure : Dustproof IP 40, Weatherproof to IP 54 / IP 65 / IP 66, Flameproof

1. MZ HYDRAULIC RANGE PRESSURE SWITCHES
Transparent tough
polycarbonate cover
for visibility
Separate
terminal block
for wiring
Internal setscrew
to avoid
easy access
to setpoint
Large spring
for ease of
setpoint
IP66 enclosure
for excellent
ingress protection
Sealing facility
to avoid
tampering of
working switch
Cable gland as a
standard accessory
Non corroding exteriors
for a long life of the switch
Approximate Weight : 0.680 Kg.
Some Applications :
SS316 & teflon as wetted parts
to switch a wide variety of media
Electr ica l Conn ect ion :
Fig. 2
Used where pressure surges and fluctuations may be Z 2 3
present like oil hydraulic systems, etc.
1

2. HYDRAULIC RANGE PRESSURESWITCHES MZ
PRESSURE CAPSULE DETAILS
5
4
3
2
Note : wetted parts are mentioned in italics. 1
INSTALLATION DRAWING
114
(4.48)
No. Description
1. Pressure housing (SS)
2. Surge Arrestor (SS)
3. Surge Reducer (SS)
4. Piston (SS)
5. O-Ring (Viton®)
93
(3.66)
85
(3.34)
Cover Locking Screw
4 Nos.
5.5
(0.22)
Cable Entry
Mounting Bracket
50
(1.97)
Pressure Port
1/4" BSP (F)
HEX A/F 22
HEX A/F 0.87
50
(1.97)
APPROX. DIMENSIONS IN
inches
.
.
.
.

3. MZ HYDRAULIC RANGE PRESSURE SWITCHES
RANGE SELECTION TABLE
Range Code Range
bar (psi)
Differential* bar (psi) Maximum
Working Pressure
bar (psi)
Approximate
Maximum
for "A8"
microswitch
040
5 - 40
(72.52- 580.15)
5
(72.52)
80
(1160.31)
100
10- 100
(145.04- 1450.38)
12
(174.05)
120
(1740.45)
200
7 - 200
(101.63- 2900.75)
24
(348.09)
200
(2900.75)
350
35- 350
(101.53- 2900.75)
24
(348.09)
500
(7251.89)
400
100- 400
(1450.38- 5801.51)
30
(435.11)
400
(5801.59)
*Minimum differential increases with setpoint (Graphs available on request)

4. Continuous efforts for product development may necessitate changes in these details without notice
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NK Instruments Pvt. Ltd.B-501/504, 5th floor, Raunak Arcade, Near THC Hospital, Gokhale Road, Naupada,
Thane(W) 400602. Maharashtra INDIA Telefax Nos.: 91-22-25301330 / 31 / 32
E-Mail: sales@nkinstruments.com Web: http://www.nkinstruments.com
Skype: nitinkelkarskype Gtalk: nkinstruments2006
Authorised Dealer