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. MD HYDRAULIC RANGE PRESSURE SWITCHES
Locking screws
for drift proof
settings
Large springs
for easy setting
Separate
terminal block
for wiring
Unique scale
enhancement
mechanism for
fine setting
resolution
Bell crank
lever for
movement
transmission
Robust
microswitch
for reliable
switching
Bearing
surface of
lever for
smooth motion
Incast pin
as a robust
fulcrum
Extra large
scale with
finer least
counts for
easier setting
External
mounting holes
for easy
mounting/
dismantling
Protective cap for
tamperproof settings
Captive cover screws
Environment
protected
switch with
IP66 protection
Choice of
conduit entries
for various
cable sizes
Approximate Weight : 0.850 Kg.
Some Applications : Used where oil is a working medium.
Electrical Fig. 2
Connection :
Z 2 3
1

2. HYDRAULIC RANGE PRESSURE SWITCHES MD
PRESSURE CAPSULE DETAILS
5
4
3
2
1
Note : wetted parts are mentioned in italics.
INSTALLATION DRAWING
147
Set Screw Cap 130 (5.78)
(5.11)
112.5
(4.43)
No. Description
1. Pressure housing
2. Surge arrestor
3. Surge reducer
4. Piston
5. O ring
62
(2.44)
Mounting Holes
2 Nos, Ø6.5
0.25
Cable Entry
37
(1.45)
HEX A/F 22
Pressure Port
1/4" BSP Female
30
(1.18)
APPROX. DIMENSIONS IN
inches

3. MD HYDRAULIC RANGE PRESSURE SWITCHES
RANGE SELECTION TABLE
Range Code Range
bar (psi)
Differential* bar (psi) Maximum
Working Pressure
bar (psi)
Approximate
Maximum
for "A1"
microswitch
040
5 - 40
(72.52 - 580.15)
5
(72.52)
80
(1160.30)
100
10 - 100
(145.04 - 1450.38)
12
(174.05)
120
(1740.45)
200
7 - 200
(101.53 - 2900.76)
24
(348.09)
200
(2900.76)
350
35 - 350
(507.63 - 5076.33)
30
(435.11)
500
(7251.9)
400
100 - 400
(1450.38 - 5801.52)
30
(435.11)
400
(5801.52)
*Minimum differential increases with setpoint (Graphs available on request)
* Note :
Microswitches A2 through A7 can be supplied in some ranges and differentials will vary with microswitch used.
Please contact sales office for details. Please check availability of adjustable differential with sales office.
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

4. HYDRAULIC RANGE PRESSURE SWITCHES MD
OWTOOEISTILYLIGEPESSESWITES
st
ct
EtySzStcTy
vs
cstc
Ty
Pst
GoupGoupGoupGoupGoupGoupGoupGoup
=
=
=
=
=
GoupGoupGoupGoupGoupGoupGoupGoup
PFAS
=
Ist
ssstc
tcst
A
cst
IPs
IS
svf
st
tst
cv
ct.W
vy
fct,
yft
tf
syts
tcst.
=
½PTts
=
¾PTts
=
X.
ts
Psscfyfmmrtvmty.
.Ayctfstc,t½"PTctyssSPTssstc,fxfftttsc,v
tss,tA.cstc,SSssst¼BSPtszsscfy
=
tt
=
=
=
=
=
=
PssPt
t/Sz
S=
SS/¼"BSPF
S=
SS/¼PTF
=
SS
PF=
PF=
PF=
P=
P=
P=
AvtA
y
Continuous efforts for product development may necessitate changes in these details without notice
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