ALM Systems

Clean Room Systems, Gauges, Manometers, Transmitters, Sensors, Multimeters

ALM Systems is the flagship of the ALM group. It is a leading manufacturer and supplier of instruments to measure and control differential pressure, flow, temperature, air velocity and relative humidity in the pharmaceuticals industry. The ALM range of products includes:

  • Differential pressure gauges
  • Flowmeters
  • Air velocity transmitter / gauges
  • Manometers pressure measuring instrument
  • Pressure indicating transmitters
  • Tube pressure switches

MAGNEHELIC® 2000 differential pressure gague

ALM's Magnehelic® 2000 gauge indicates low gas or air pressure with a positive or negative differential; it is accurate within 2% and is available with 80 ranges.

PHOTOHELIC® 3000 differential pressure gague

Photohelic® 3000 and Capsu-Photohelic 43000 switch gauges are equipped with an indication accuracy of 2%. The system is available with a switch repeatability of 1%, and is equipped with both low-limit and high-limit controllers.

VISI-Float flowmeters - series VF

Precision machined from solid acrylic, the VISI float flowmeter is used to indicate or manually control air or gas flow from .1 SCFH to 100 SCFM water from .6 GPH to 20 GPM.

RATE-MASTER® flowmeters - series RM

Moulded of tough polycarbonate plastic this flowmeter is used to indicate or manually control air or gas flow from .1-1,800 SCFH water flows to 10 GPM.

Smart air velocity transmitter - series PFS

The smart air velocity is field rangeable and has a 0.1 Second Response, ± 0.2% repeatability.

PORTABLE MAGNAHELIC® pressure-air velocity gauges

The portable Magnahelic pressure air-velocity gauge has a dead read-out, meaning no tapping is necessary.

ALM MARK II 25/40 manometer pressure measuring instrument

This moulded plastic manometers is a low-cost measuring instruments with 3% accuracy for stationary and portable applications.

MARK III 475-FM manometer pressure measuring instrument

The mark II 475 manometer is a hand-held digital manometer that ranges from 4in w.c. to 150psid with + or - 0.5% accuracy. The manometer is intrinsically safe for hazardous locations.

Pressure indicating transmitters

ALM's Magnehelic differential pressure indicating transmitter series 605 is equipped with a dial gauge indication and two-wire 4-20mA outputs.

603A differential pressure transmitters are available with a 4-20mA signal. It is equipped with a two, three or four wire operational ability and ranges from 0.1in water column. The system is accurate within + or - 2% span.

ALM also manufactures:

  • 607 and 604A series differential pressure transmitters
  • 604D series Minihelic® differential pressure indicating transmitters
  • 642 series pressure transmitters
  • 666 series rangeable differential pressure transmitters
  • 7116B series Spirahelic® pressure indicating transmitters

Tube pressure switches

ALM's DA/DS Bourdon tube switch series includes a visible set point with an adjustable deadband, and has a pressure range from 0 to 5,000psi. The 1900 series of compact low-pressure differational switch is a low-cost precision switch with a repetitive accuracy of 3%. It is equipped with six standard ranges and set points from 0.07in to 85in w.c.

ALM also manufactures differential switches for general industrial service. These products are compact, ergonomically designed and with capable of eight standard ranges. Set points range from 0.07in to 85in w.c. with a repetitive accuracy of 2%. Other products include:

  • H3 series explosion-proof differential pressure switches
  • 1950G series integral explosion-proof pressure switches
  • 1950 series explosion-proof differential pressure switches


ALM is a leading manufacturer of acrylic manometers (for differential pressure measurement) in the world. High-profile HVAC clients include:

  • Blue Star
  • Suvidha Engineers
  • ETA Engineering
  • Carrier Aircon
  • Vilshom Engineers
  • Batliboi
  • Apex

The ALM range of products has been installed in various prestigious USFDA approved plants in India, China, Thailand, Vietnam and Malaysia. In addition, the company's products are used in pharmaceutical plants that include Ranbaxy, Cipla, Dr. Reddy' Laboratories, Unichem and Aventis. ALM is ISO 9001:2000 certified by the Joint Accreditation System (JAS) of Australia and New Zealand.

Contact Details

ALM Systems
304, Damji Shamji Industrial Complex
L. B. S. Marg
Kurla (W)
Mumbai 400 070
+91 22 25126700
+91 22 25126900
+91 22 25041530
+91 22 25126700