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 LARGE BORE HIGH 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 : 0.900Kg.
Some Applications:
Electrical Connection :
Fig. 2
SS316 & teflon
as wetted parts
to switch a
wide variety
of media
Applications requiring a large bore, for slurries, Z 2 3
sludges, etc.
1

2. LARGE BORE HIGH RANGE PRESSURE SWITCHES MZ
PRESSURE CAPSULE DETAILS
No. Description
1. Pressure Port (SS316)
2. Diaphragm (Teflon
®
)
3. Plunger
4. O-Ring (Teflon®
)
5. Disc
3
5
2
4
1
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
115
4.53
95
3.74
85
3.35
COVER LOCKING
SCREW 4 NOS
CABLE ENTRY
PRESSURE PORT
1" BSP(M)
Ø18
Ø0.71 50
1.97
5.5
SLOT WIDTH 0.22
2 NOS FOR MOUNTING
Hex 40
Hex 1.58
APPROX. DIMENSIONS IN
inches

3. LARGE BORE HIGH RANGE PRESSURE SWITCHESMZ
RANGE SELECTIO N TABLE
Range Code Range bar (psi) Differential* bar (psi) Maximum Working
Pressure bar (psi)Approximate
Maximum
for "A8"
microswitch
H01
0.1 - 1.0
(1.45 - 14.50)
0.10
(1.43)
12
(171.43)
H02
0.1 - 1.5
(1.45 - 21.76)
0.20
(2.86)
12
(171.43)
H03
0.2 - 2.6
(2.90 - 37.71)
0.20
(2.86)
12
(171.43)
H04
0.2 - 3.6
(2.90 - 52.21)
0.20
(2.86)
12
(171.43)
H07
0.5 - 7.0
(7.25 - 101.50)
0.40
(5.72)
12
(171.43)
H10
0.5 - 10.0
(7.14 - 142.86)
0.60
(8.58)
25
(357.14)
H15
1.0 - 15.0
(14.29 - 214.29)
0.60
(8.58)
25
(357.14)
H30
5.0 - 25.0
(71.43 - 357.14)
0.80
(11.44)
35
(500.00)
*Minimum differential increases with setpoint (Graphs available on request), results for neoprene diaphragm.
Note: Welded diaphragm also available as shown
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

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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