Protecting Workers & Facilities: Cannabis Processing...Local annunciation may be employed and gas detection alarm contacts interlock with other devices and AC power to shutdown the

OSHA 29 CFR 1910.1000 Table Z-1 Limits for Air Contaminants l PEL: Permissible Exposure Limit as an 8 Hour TWA

ACGIH: American Conference of Governmental Industrial Hygienists

NIOSH IDLH: Immediately Dangerous to Life or Health, The National Institute for Occupational Safety and Health

California Fire Code: Chapter 38 Plant Processing and Extraction Facilities

2018 IFC, The International Fire Code l NFPA 1, The Uniform Fire Code l NFPA 70, The National Electrical Code

NFPA 30, The Flammable and Combustible Liquids Code l NFPA 58: The Liquefied Petroleum Gas Code

UL 1389, Outline of Investigation for Plant Oil Extraction Equipment

Protecting Workers & Facilities: Cannabis ProcessingFixed Gas Detection Technical Brief

www.SensidyneGasDetection.com

GAS HAZARDS

Solvent Extraction is used to remove the

essential oils from plant matter which is then

distilled to separate it into the desired compounds

and remove the solvent.

Common process “solvents” include

Ethanol, other flammable liquids, Butane and

Carbon Dioxide. Most are toxic and highly

flammable while CO2 is toxic and can cause

asphyxiation.

Flammable solvents require storage, piping,

valves and controls for proper process operation

and safety. Monitoring flammable and toxic gases

is mandatory per regulation.

CO2 is another common hazard at these

sites coming from cylinders or a gas burning

generator. Monitoring for Carbon Monoxide (CO),

Carbon Dioxide (CO2), and Natural Gas or

Propane is required when a generator is use.

Process Illustration courtesy of Precision Extraction Solutions

HOW TO MONITOR FOR COMPLIANCE AND TO IMPROVE SAFETY

Building and safety regulations specify the use of gas detection to be installed in specific

areas based on gases to be monitored and the area hazard classification. Codes call for bottom

air make-up ventilation and a listed gas detector within 12 inches of the lowest point for

flammables. Detectors are often placed in front of the exhaust ventilation grills and on the

process equipment near the potential leak points. CO2 is monitored in the waist to face zone as

it is a breathing hazard but heavier than air.

Local annunciation may be employed and gas detection alarm contacts interlock with other

devices and AC power to shutdown the process if an alarm is higher than 25% LFL. Ventilation

fans are activated by a gas alarm of 10% LFL or higher. Indoor gas storage and solvent

recovery areas require their own gas detectors and ventilation.

SENSIDYNE GAS DETECTION EQUIPMENT

Sensidyne has decades of experience in manufacturing fixed gas detection and we

pioneered intelligent gas sensors and universal transmitter in the 1990s. Customers rely upon

our high quality products for asset protection and personnel safety. The staff has decades of

experience in process, industrial, manufacturing and HVAC applications and should be

consulted for specific solutions to dangerous gas exposure and compliance issues.

Founded in 1983, Sensidyne is ISO 9001: 2015, EN 13485: 2003 certified. Fixed gas

detection has global approvals for hazardous (classified) areas, SIL 2, sensor performance

certifications, CE Mark, and RoHS. Every team member is charged with delivering products and

solutions that are effective and robust for customer satisfaction.

CAS

Number

Chemical

Name

OSHA PEL

8 Hour TWA

ACGIH STEL

15 Minutes

NIOSH IDLH

30 Minutes

Flammability

LFL %Volume

Flash Point

°F / °C

Vapor Density

Air = 1.0

124-38-9 Carbon Dioxide 5,000 ppm 30,000 ppm 40,000 ppm Nonflammable - - 1.50

64-17-5 Ethanol 1,000 ppm 1,000 ppm 3,300 ppm 3.3% 57° / 14° 1.50

106-97-8 Butane 800 ppm 1,000 ppm 1,600 ppm 1.8% Gas 2.10

67-63-0 Isopropyl Alcohol 400 ppm 400 ppm 2,000 ppm 2.0% 53° / 12° 1.05

142-82-5 Heptane 400 ppm 500 ppm 750 ppm 1.1% 25° / -4° 3.50

110-54-3 Hexane 500 ppm 50 ppm TWA 1,100 ppm 1.1% -7.6° / -22° 3.00

108-88-3 Toluene 200 ppm 300 ppm Ceiling 500 ppm 7.1% 40° / 4° 3.10

Non-Intrusive User Interface

Horizontal or Vertical Conduit Entry

3-wire Design with 4-20mA Output

Modbus®, BACnet® and Relays Offered

FM Class I, Div. 1 & 2; ATEX Zones 1 & 2

Bright LED Display or OEM Blind Models

More Than 25 Serviceable Sensor Types

COST-EFFECTIVE ADVANCED GAS DETECTOR

SensAir is based on decades of proven gas detector

design. The result is a performance certified advanced product

with greatly enhanced capabilities, including an easy to use

non-intrusive user interface, clear LED display and intuitive

configuration and maintenance functions, which are accessed

with a magnetic stylus.

Transmitter enclosure material options are offered along

with horizontal or vertical conduit mounting and accessories for

duct mounting, sample draw and remote gassing.

Communication options have been expanded to include

Modbus®, BACnet® and Alarm relays in addition to 3-wire,

4-20mA. More than 25 gas sensor types are offered.

Combustibles, Toxics

and Oxygen Gas Detection

GAS DETECTION SYSTEM CONTROLLERS

Sensidyne offers Digital Gas Detection Controllers to power,

display and provide output and alarm functions that are required by the

safety systems user and engineers. Input capacity ranges from 4, 8

and 16 gas detectors to a maximum of 64. Signal output protocols

include discrete 4-20mA, RS 485 Modbus®, Ethernet and contacts.

The controllers are hazardous area approved for installation in a

Class I, Division 2 classified environment and to receive inputs from

gas detectors in a Class I, Division 1 hazardous (classified) area.

Alarm relays are provided for annunciation and mitigation

measures such as fans and process shutdown. Fail-safe operation is

standard with supervisory alarm notifications for Fire and Building

Automation systems. An alarm acknowledgement function is provided

and a gas detection system UPS is required by the fire code. 4-Channel 9000 8/16 Channel 7100

Cannabis February 6, 2019