Micro Max
Portable Multi-Gas Monitor

  • Monitoring of combustible gases, O2, and up to two toxic gases.
  • Internal sampling pump or diffusion models.
  • Optional data downloading.
  • Easy, push-button operation.
  • Interchangeable toxic gas sensors.
  • Automatic calibration.
  • Smallest, lightest microprocessor controlled multi-gas monitor available.
  • Large, simultaneous display of all gases.
  • Peak, TWA, and STEL alarms.
  • Low battery warning, low battery alarm.
  • Auto backlighting.
  • Plug-in sensors.
  • NiCad or alkaline batteries.
  • Sturdy carrying case with belt loop and shoulder strap.
  • RFI/EMI resistant.
  • Intrinsically safe design.
  • Two year limited warranty.
Technical Specifications
Gases/Ranges Combustible gases 0 - 100% LEL

Oxygen (O2) 0 - 25% Vol.

Carbon Monoxide (CO) 0 - 800 PPM

Hydrogen sulfide (H2S) 0 - 800 PPM

Sulfur dioxide (SO2) 0 - 20 PPM
Accuracy +/- 5% Reading
Alarm Output Audible - 90 db at one foot

Visible - Red LED, flashing display
Temperature Range -20° to 50°C
Humidity Range 0 - 99% RH (Non-condensing)
Weight 14.6 ounces
Approvals UL classified intrinsically safe for
use in Class I & II, Division 1 & 2,
Groups A, B, C & D areas

Instruments include: rechargeable NiCad battery pack, overnight NiCad battery charger, alkaline battery adapter, carrying case with shoulder strap, 10' sampling hose with water trap.

Item Price
MAX-4A-P Micro Max - 02, Comb., CO1H2S 1,895.00
MAX-3E-P Micro Max - 02, Comb., H2S 1,685.00
MAX-OS Oxygen Sensor, M1 140.00
MAX-ES Comb., Sensor 240.00
MAX-CS Carbon Monoxide Sensor 295.00
MAX-HS Hydrogen Sulfide Sensor 295.00



Gaspro Plus
Portable Multi-Gas Monitor

  • Continuously measures the concentrations of 2, 3 or 4 gases simultaneously, including oxygen, a combustible gas and up to two toxic gases, such as CO, H2S or SO2. (CI2 optional).
  • Portable and lightweight unit housed in a rugged RFI shielded plastic housing.
  • Audible and visual alarms.
  • Built-in sampling pump.
  • Microprocessor controlled.
  • Features include self test and auto zero modes, peak and average readings, elapsed time and battery readings, and low flow and low battery warnings.
Technical Specifications
Accuracy +/- 2% FSD
Operating Temperature -15°C to 50°C
Humidity 0 to 98% RH (non-condensing)
Weight 1 lb., 6 oz.
Detectable Gases/Ranges Combustibles 0 to 100% LEL

Hydrogen sulfide (H2S) 0 to 800 PPM

Carbon Monoxide (CO) 0 to 800 PPM

Oxygen (O2) 0 to 50% V/V

Sulfure dioxide (SO2) 0 to 20 PPM

Chlorine (Cl2) 0 to 10 PPM
Response Time Combustible gas and H2S-90<25 seconds, CO and O2-90<15 seconds, consult factory for Cl2

Instrument includes: A.C. charger, carrying strap, 10' sampling hose with water trap, and NiCad battery pack.

Item Price
MPU 16-4A GasPro Plus -02, Comb., CO, H2S 2,240.00
EGS215 Oxygen Sensor (Serial #<6000) 140.00
EGS230 Oxygen Sensor (Serial #>6000) 140.00
EGS225 Carbon Monoxide Sensor 310.00
EGS224 Hydrogen Sulfide Sensor 310.00
EGS220 Combustible Sensor 252.00



The PhD Plus
Portable Multi-Gas Monitor
PhD Plus will monitor up to four atmospheric hazards simultaneously. The PhD Plus measures O2, combustible gas, and up to two toxic gases. The PhD Plus is housed in a rugged, compact case. All procedures necessary for daily operation, including automatic calibration adjustment, are controlled by a single On/Off "Mode" button. Standard accessories: leather case, hand aspirated sample draw kit, operators guide, video.

  • NiCad kit includes battery pack and "Fast Charger" plus alkaline pack.
  • Confined Space kit also includes calibration kit.
  • Value pack includes: alkaline version instrument, calibration gas and regulator, carrying case.
Item Price
54-01-30102-A PhD+ with 02, LEL, CO, H2S - Alkaline 1,495.00
54-01-30102-N PhD+ with 02, LEL, CO, H2S - NiCad 1,695.00
54-01-30102-NC PhD+ with 02, LEL, CO, H2S, NiCad - Con Sp Kit 2,315.00
54-01-30500-V PhD+ with 02, LEL, CO Plus Value Pack 1,395.00




The PhD Ultra
Portable Multi-Gas Monitor
The PhD Ultra measures oxygen, combustibles, and up to two toxic gases. Choose from substance specific sensors for the detection of CO, H2S, SO2, NH3, Cl2, NO and NO2, or Biosystems' dual purpose "CO Plus" sensor for the simultaneous measurement of both CO and H2S. All procedures including automatic calibration adjustment, are controlled through the use of a single On/Off "Mode" button. The PhD Ultra, like the PhD Plus is designed to be the easiest-to-use atmospheric monitor ever! See PhD Plus for standard accessories and battery configurations.

Item Price
54-02-30102-A PhD Ultra - O2, LEL, CO, H2S - Alkaline 1,695.00
54-02-30102-N PhD Ultra - O2, LEL, CO, H2S - NiCad 1,895.00
54-02-30102-NC PhD Ultra - O2, LEL, CO, H2S - Con. Sp. Kit 2,515.00



STM2100
Portable Multi-Gas Monitor
Gas Tech's STM2100 personal portable gas monitor is designed to protect workers from hazardous gases in confined spaces and other industrial work sites.

  • One button operation and calibration.
  • Programmable for user and location I.D. provides easy compliance reporting/documentation.
  • 100% sensor failure monitoring and indicates if sensors are missing.
Item Price
72-0284-01 STM2100, Comb., O2, CO, H2S 1,780.00



GT Series
Portable Multi-Gas Monitorc

  • Built-in pump meets federal regulation compliance for pre-testing of confined spaces and other remote areas.
  • LCD backlight display shows: real-time gas concentrations, date and time, battery capacity, alarm set points, diagnostics, log remaining hours, TWA, STEL, minimum and maximum readings can be called to the display.
  • Monitoring of hydrocarbons in the LEL/ppm range is standard.
  • Built-in datalogger.
  • Weighs only five pounds.

Specifications: Sampling method - sample draw internal pump; battery life - 9 hours; warranty - one year.

Item Price
72-6201-01 GT201-Dual Channel, O2, Comb., Alkaline 1,653.75



Tritector-CGS-90R
Portable Multi-Gas Monitor
The portable triple-function BROAD RANGE gas detector for confined space entry atmospheric testing.

  • Durable, lightweight aluminum enclosure.
  • Nominal 8 hours service life from nickel cadmium (NiCad) power pack.
  • Includes detachable sensor head and 20 foot sensor cable.
  • Confidence chirp every 7 seconds for proof of operation.
  • Sensor technology: toxic and combustible_broad range solid state metal oxide semiconductor (MOS).
Item Price
04955-003 Tritector - CGS-90R - Gases CAL F 1,495.00



Omni-4000
Portable Multi-Gas Monitor
Absolutely the Most Versatile, Most Powerful Portable Gas Detector on the Market Today. SMART BLOCK modules are available for H2, CO, H2S, SO2, Cl2, HCN, HCI, NO, NO2, NH3, O3, ClO2, ETO and O2. Another unique feature allows the user to select the combustible gas he/she wishes to monitor from the instrument's internal memory of 25 preprogrammed combustible gases and vapors. Continuous data-logging for industrial hygiene and data management applications. It stores up to 48 hours of exposure and event information which can be downloaded to a serial printer for an IBM compatible personal computer.

  • 12 to 14 hours continuous operation.
  • Backlighted LCD.
  • Continuous datalogging up to 48 hours.
Item Price
02500-010 Omni-4000 - Comb., O2, CO, H2S 2,395.00



The Cannonball®
Portable Multi-Gas Monitor
Monitor up to four gases...O2, combustible gas, and specific toxic gases...in the most rugged environments.

  • Photosensor automatically lights up the display in dark locations.
  • All data is stored...display on screen or download to a computer.
  • Rechargeable lead acid battery with alkaline D-cell backup.
  • Storage space for accessories.
  • Completely sealed waterproof case.
Item Price
1702-A Cannonball - Comb., Oxygen, H2S 2,445.00
1705-A Cannonball - Comb., Oxygen, H2S, CO 2,695.00