SEC 3120 Dual Sensor
SEC 3120 Dual Sensor

SEC 3120 Digital Gas Transmitter Dual Sensor

The SEC 3120 provides interface capabilities for any and all SEC gas detectors.

Call for pricing: 800-952-3293 or email sales@afcintl.com

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Description

The SEC 3120 Dual Sensor provides dual interface capabilities for any and all SEC gas detectors. An optional IS barrier allows “hot” sensor replacement in rated locations. This allows the user to install pre-calibrated/pre-configured sensor boards without removing unit power while maintain EX rating. Removable circuit board stack and detachable connectors facilitate field wiring installation.

Features

  • Dual sensor interfacing to enable like-sensor redundancy or control or dissimilar sensor types
  • back lighted LCD for gas level/unit parameter display
  • Four alarm/fault relays configurable for alarm set points, latching and multi sensor relay logic
  • An isolated RS485 Modbus interface provides reliable communication in noisy environments and eliminates “ground Loop” problems
  • Three magnetic switches for local configuration and calibration without compromising explosion proof protections
  • Time stamped date logging using a removable non-volatile memory module. Module can be removed from the unit to allow remote data downloading and data archiving.
  • Dual sensor interface capability
  • Explosion proof
  • Back lighted LCD display
  • Low cost
  • Plug and play toxic, oxygen and combustible gas sensors
  • Self check system
  • 4-20 mA output
  • RS-485 interface (isolated)
  • Alarm and fault relays
  • Non intrusive configuration
  • Non intrusive calibration
  • Removable, non volatile, time stamped data logging memory stick
  • Optional IS barrier
  • Digital communication link to SEC 3000, SEC 3300, SEC 5000 and Millenium gas detectors
  • Multi port housing for easy installation

Applications

  • Petrochemical refineries
  • Compost facilities
  • Semi conductor
  • Mining
  • Pulp and paper mills
  • Oil rig platforms
  • Buildings
  • Automotive industry
  • Engine test rooms
  • Sewage
  • Parking garages

Specifications

Outputs Digital: RS-485 LAN
Analog: 4-20 mA source type, max 1000 ohm load at 24 VDC supply voltage
Relays: 3 alarm & 1 fault
Display Back lighted LCD, LEDs for relay indication
Detection Method Toxic: Electrochemical
Combustible: Infrared
Operating Voltage 18 to 32 VDC
Operating Current 314 mA Max @ 24 VDC
Power Consumption Nominal: 1.2 W
Relays: Add 1 W
Heater: Add 5.9 W
Temperature Rating -40 to +40°C
Humidity 0-99% rH non condensing
RFI Built in filter reject RFI/EMI
Housing Epoxy coated aluminum
Certification CSA/NRTL CI I, Div 1, Groups B, C, D T5
Dimensions 5.25″ W x 5.3″ L x 4.95″ H
Weight 6 pounds

Gases & Ranges

Gas
Range
Ammonia
0-200 ppm
Arsine
0-1,000 ppb
Bromine
0-2 ppm
Carbon Monoxide
0-100 ppm
Chlorine
0-10 ppm
Chlorine Dioxide
0-2 ppm
Diborane
0-1,000 ppb
Ethylene Oxide
0-20 ppm
Fluorine
0-2 ppm
Formaldehyde
0-20 ppm
Germane
0-1,000 ppb
Hydrogen
0-1,000 ppm
Hydrogen Chloride
0-20 ppm
Hydrogen Cyanide
0-20 ppm
Hydrogen Fluoride
0-10 ppm
Hydrogen Peroxide
Call
Hydrogen Selenide
0-1,000 ppb
Hydrogen Sulfide
0-100 ppm
Nitric Oxide
0-100 ppm
Nitrogen Dioxide
0-15 ppm
Oxygen
0-40% Vol
Ozone
0-2 ppm
Phosgene
0-2 ppm
Phosphine
0-1,000 ppb
Silane
0-20 ppm
Sulfur Dioxide
0-20 ppm

Unit Status Chart

Current
Output
Status
4-20
mA
 Normal measuring mode
0.0
mA
 Unit fault
0.8
mA
 Unit warm up
1.2
mA
 Zero drift fault
1.6
mA
 Calibration fault
2.0
mA
 Unit spanning
2.2
mA
 Unit zeroing
4.0
mA
 Zero gas level
5.6
mA
 10% of full scale
8.0
mA
 25% of full scale
12
mA
 50% of full scale
16
mA
 75% of full scale
20
mA
 100% of full scale
>20
mA
 Over range (>100%)

Ordering Information

For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email sales@afcintl.com.

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SEC 3120 Dual Sensor Literature

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