We have Diaphragm type Differential Pressure Switches. These gauges are more in demand for DP control applications in HVAC / across Heat Exchangers / across Pumps / across Filters / across Strainers, Level Control applications in pressurized tanks, Ranges : from 0 to 150 mm WC up to 0 to 7 bar Differential : Fixed Accuracy : +/- 1% FS Temperature Range : -10 to 80 Degree C (for high-temperature use of impulse tube is advisable) Migration : Impossible No. of Switches : One or, Two. Type of Switches : Micro Switches - SPDT, 5 A 250 V AC Enclosure class : IP 54, IP 65, IP 66 or, Flameproof Pressure Housing : MS or, SS Sensing Diaphragm : Neoprene or, Teflon Process Connection : ¼” BSP-F (Standard)

1. MT Low ΔP High Proof
Pressure Difference Switches
C A T A L O G U E
BULLETIN NO. : KA170411
Website : http://www.orion-instruments.com
Kaustubha Udyog AN ISO9001:2008 COMPANY
S. No. 36/1/1, Sinhgad Road, Vadgaon Khurd,
Near Lokmat Press, Pune 411 041 INDIA
Tel.
Telefax
Email
: +91-(0) 20-24393577 / 24393877
: +91-(0) 20-24393577 / 25460486
: pressure@vsnl.com
PRESSURE SWITCHES
PRESSURE DIFFERENCE SWITCHES
VACUUM SWITCHES
From 1.5 mbar to 600 bar
Certificate No.: FM72815

2. INSTALLATION DRAWING
APPROX. DIMENSIONS IN
mm
inches
PRESSURE CAPSULE DETAILS
Note : wetted parts are mentioned in italics.
LOW ΔP HIGH PROOF PRESSURE DIFFERENCE SWITCHES
75
BULLETIN NO. : KA170411
MT
2
98.0
(3.85)
51
(2.0)
87
(3.42)
198
(7.0)
75.0
(2.55)
High Pressure
Port
1/4" BSP(F)
130.0
(5.11)
149.0
(5.86)
51
(2.0)
31
(1.22)
Mounting Holes
Ø7
2 Nos.
Ø150
(5.11)
31
(1.22)
Low Pressure
Port
1/4" BSP(F)
18.0
(0.7)
1
2
3
4
6
5
7
8
9
10
12
11
Description
Sealing diaphragm ( Neoprene)
'O' Ring (Viton)
'O' Ring ( Teflon)
High Pr. flange (S.S.)
Support spring (S.S.)
Support ring ( S.S.)
Sealing ring (Teflon)
Support plate (S.S.)
Diaphragm (Neoprene)
Low Pr. flange (S.S.)
Transfer pin (S.S.)
Clamping screw (C.S.)
Lock nut (S.S.)
No.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
13
145.0
(5.11)

3. LOW ΔP HIGH PROOF PRESSURE DIFFERENCE SWITCHES MT
75
BULLETIN NO. : KA170411
3
RANGE SELECTION TABLE
M03
M05
M10
M15
M25
M35
Differential* mbar ("wc)Range Code Range
mbar ("wc)
Maximum
Working Pressure
bar (psi)
Approximate
Maximum
for "A1"
microswitch
* Minimum differential increases with setpoint (Graphs available on request)
* Differentials of miroswitches A2 through A9 will vary. Differentials for A7 are typically twice that for A1 microswitch.
Please indicate specifically the differential value in enquiry/order, when it is critical in your application.
5 - 25
(2.007 - 10.037)
10 - 50
(4.015 - 20.073)
10 - 100
(4.015 - 40.146)
10 - 150
(4.015 - 60.22)
20 - 250
(8.03 - 100.36)
50 - 350
(20.073 - 140.51)
100
(1450.38)
100
(1450.38)
100
(1450.38)
100
(1450.38)
100
(1450.38)
110
(1595.42)
5
(2.007)
5
(2.007)
10
(4.015)
10
(4.015)
15
(6.022)
35
(14.05)

4. LOW ΔP HIGH PROOF PRESSURE DIFFERENCE SWITCHES
75
BULLETIN NO. : KA170411
MT
4
HOWTOORDERINDUSTRIALLOWΔPHIGHPROOFPRESSUREDIFFERENCESWITCHES
Nonstandard
allocation
GasGroup
Classification
CableEntrySizeSwitchTypeRangeCode
(valuesinmbar)
Microswitch
Type
Diaphragm
Group1Group2Group3Group4Group5Group6Group8Group7
0=
Neoprene
1=
Teflon
Group1Group2Group3Group4Group5Group6Group8Group7
Pleasespecifyfullmodelnumbertoavoidambiguity.Ifonlythefirsttwogroupsarespecifiedwhileordering,uncalibratedswitcheswithstandardwetted
partsandenclosureswillbesupplied.
MT1DF1M25A10S1
M03=
(5-25)
M05=
(10-50)
M10=
(10-100)
M15=
(10-150)
M25=
(20-250)
M35=
(50-350)
eg.AnIndustrialpressureswitch,with½"NPTcableentryinaluminiumhousingas1SPDTpressureswitch,fixeddifferentialwithscale,having20mbarto
250mbarpressurerange,with15Amp.microswitch,SS316pressurehousingwith¼”BSPportsizeshallbespecifiedby
A1=General
purposemicroswitch
ratedat15A;250
VAC
*A2=Hermetically
sealedforcorrosive
environments
*A3=goldplated
contactsforlow
voltageapplications
*A4=DPDT
configuration
*A5=forhighDC
ratings
*A7=2SPDT
switchingelements
*A9=General
purposemicroswitch
ratedat5A;250
VAC
MT=
Industrial
pressureswitch
withdiecast
Aluminium
enclosureto
IP66asper
IS2147
Reservedfor
non-standard
optionsnot
coveredin
catalogue.Will
begivenby
manufacturer,
onlyafter
agreementof
supplydetails
withcustomer.
1=
½“NPTthreads
3=
M20X1.5
threads
PressurePort
Material/Size
S1=
SS316/¼"BSP(F)
S2=
SS316/¼”NPT(F)
*Pleaserefernoteunder
RangeSelectionTable
DF2=pressure
differenceswitch,
fixeddifferentialwith
scaleinmbar
DF3=pressure
differenceswitch,
fixeddifferentialwith
scalein"wc
*DA2=pressure
differenceswitch,
adjustabledifferential
withscaleinmbar
*DA3=pressure
differenceswitch,
adjustabledifferential
withscalein"wc
*AvailablewithA9
(ingroup6)only