Geiger Müller Tubes

Global Nucleonics offers a wide range of Geiger Müller tubes of all types to detect alpha, beta, gamma and x-ray radiation (or combinations thereof) in a large range of radiation field activity levels. GM tubes are known to be effective for a large variety of end use applications such as health physics, security, industrial, oil field services, NDT and scientific research.

GM tube types include:

Miniature GM tubes
Cylindrical thick and thin wall GM tubes
Energy compensated GM tubes
Ruggedized/high temperature GM tubes
Pancake and other mica window GM tubes

All Global Nucleonics GM tubes are designed and manufactured at our ISO certified facility in Houston, Texas. We have been in business at this location since 2008.

Scroll down to see summary specifications of our standard GM tubes or use search button on the top right of website to find the detector you are looking for. Click on the detectors name to get more detailed specifications and sales drawing.

While we offer a comprehensive mix of standard GM tube designs we make other custom builds and our engineering/design capabilities are adept at making tubes for special applications. If you don't see what you are looking for, get in contact: info@globalnucleonics.com .

Specs for all GM Tubes

Detector	Radiation Detected	Cs-137 Photon Response (cpm/mR/h)	Max. Shielded background (cpm)	Max. Dead Time (u sec)	Dose Rate Limit (R/h)	Suggested Operating Voltage (volts)	Max. /Effective Length (inches)	Max. /Effective Diameter (inches)
ZP1300	β, γ	19	1	11	2,000	550	0.91 / 0.28	0.24 / 0.19
ZP1310	β, γ	85	2	15	500	575	1.40 / 0.63	0.24 / 0.19
GN1320	β, γ	475	12	45	20	575	2.00 / 1.10	0.31 / 0.31
ZP1301	γ	19	1	13	2,000	550	0.91 / 0.28	0.54 / 0.19
ZP1313	γ	85	2	15	400	575	1.50 / 0.63	0.35 / 0.19
GN1321	γ	475	12	45	10	575	2.17 / 1.10	0.55 / 0.31
GN1200	γ	1400	10	90	10	500	2.20 / 1.60	0.67 / 0.57
GN1210	γ	5200	50	200	1	450	6.70 / 5.51	0.94 / 0.90
GN1220	γ	9000	60	210	0.3	450	10.6 / 9.50	0.94 / 0.90
GN310/3P	γ	4700	50	100	1	900	7.80 / 5.80	0.63 / 0.60
GN106/3P	β, γ	2200	30	100	1	900	5.60 / 3.80	0.63 / 0.60
GN107-HT	β, γ	5200	60	100	1	900	10.8 / 8.90	0.63 / 0.60
GN112	β, γ	1500	20	150	1	900	4.30 / 2.30	0.94 / 0.73
GN112X	β, γ	1100	20	150	1	900	4.30 / 2.30	0.94 / 0.73
GN114	β, γ	800	12	100	2	900	3.80 / 1.20	0.63 / 0.60
GN119HS	β, γ	4800	50	150	0.5	900	7.40 / 5.50	0.94 / 0.73
GN1420-8767	α, β, γ	3350	25	100	1	900	3.00 / 0.42	2.10 / 1.80
GN1422-FL	α, β, γ	3350	25	100	1	900	1.20 / 0.42	2.10 / 1.80
GN1420-500	α, β, γ	3350	25	100	1	500	3.00 / 0.42	2.10 / 1.80
GN1422-500	α, β, γ	3350	25	100	1	500	1.20 / 0.42	2.10 / 1.80
GN1431	α, β, γ	2650	20	230	0.7	575	1.90 / 1.40	1.34 / 1.10
GN210-BNC	α, β, γ	2200	20	200	0.2	900	4.50 / 2.50	1.40 / 1.20
GN1490	α, β, γ	1500	15	60	2	575	1.10 / 0.38	1.00 / 0.78
GN210-4P	α, β, γ	2200	20	150	0.2	900	5.00 / 2.50	1.00 / 0.78
GN201	α, β, γ	2700	25	150	0.5	900	5.90 / 4.00	0.88 / 0.25
GN204-BNC	α, β, γ	1300	25	150	10	900	4.50 / 1.40	0.59 / 0.50
GN222	α, β, γ	500	4	60	2	900	2.10 / 9.30	0.77 / 0.57
GN1401	α, β, γ	1300	10	90	10	500	2.20 / 1.50	1.10 / 0.90
GN1201	γ	1400	10	90	10	500	2.30 / 1.60	1.10 / 0.90
GN1211/02	γ	5200	50	200	1	450	6.70 / 5.51	0.77 / 0.35
GN1221	γ	9000	60	210	0.3	450	10.6 / 9.45	0.75 / 0.73
GN1402	α, β, γ	1300	10	100	10	500	2.20 / 1.50	0.75 / 0.74
GNP334-6.6	γ	7850	25	150	1	900	6.90 / 5.60	0.62 / 0.60
GNP334-6/3P	γ	7050	25	150	1	900	6.70 / 5.00	0.62 / 0.60
GNP358-6/3P	γ	4860	20	100	1	900	6.40 / 4.50	0.62 / 0.60
GNP358-4R	γ	4500	20	100	1	900	6.90 / 4.00	0.62 / 0.60
GNP358-9R	γ	10000	40	100	1	900	11.9 / 9.00	0.62 / 0.60
GNP358-6RH	γ	4860	20	100	1	900	5.90 / 4.50	0.62 / 0.60
GNP358-7RH	γ	7600	30	100	1	900	8.90 / 6.70	0.62 / 0.60
GNP358-9RH	γ	10000	40	100	1	900	11.0 / 9.00	0.62 / 0.60
GNP358-1.1	γ	1250	8	100	10	450	2.20 / 1.10	0.62 / 0.60
GNP358-1.8	γ	2100	10	100	10	750	2.90 / 1.80	0.62 / 0.60
GNP358-3.5	γ	2800	12	100	10	900	3.80 / 2.50	0.62 / 0.60

Mica Window GM Tubes

Global Nucleonics manufactures a large mix mica based radiation entrance window GM tubes of various geometries including pancake GM tubes as well as end window and side window configurations.

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Mica Window GM Tubes Specs

Detector	Radiation Detected	Cs-137 Photon Response (cpm/mR/h)	Max. Shielded background (cpm)	Max. Dead Time (u sec)	Dose Rate Limit (R/h)	Suggested Operating Voltage (volts)	Max. /Effective Length (inches)	Max. /Effective Diameter (inches)
GN1420-8767	α, β, γ	3350	25	100	1	900	3.00 / 0.42	2.10 / 1.80
GN1422-FL	α, β, γ	3350	25	100	1	900	1.20 / 0.42	2.10 / 1.80
GN1420-500	α, β, γ	3350	25	100	1	500	3.00 / 0.42	2.10 / 1.80
GN1422-500	α, β, γ	3350	25	100	1	500	1.20 / 0.42	2.10 / 1.80
GN1431	α, β, γ	2650	20	230	0.7	575	1.90 / 1.40	1.34 / 1.10
GN210-BNC	α, β, γ	2200	20	200	0.2	900	4.50 / 2.50	1.40 / 1.20
GN1490	α, β, γ	1500	15	60	2	575	1.10 / 0.38	1.00 / 0.78
GN210-4P	α, β, γ	2200	20	150	0.2	900	5.00 / 2.50	1.00 / 0.78
GN201	α, β, γ	2700	25	150	0.5	900	5.90 / 4.00	0.88 / 0.25
GN204-BNC	α, β, γ	1300	25	150	10	900	4.50 / 1.40	0.59 / 0.50
GN222	α, β, γ	500	4	60	2	900	2.10 / 9.30	0.77 / 0.57
GN1401	α, β, γ	1300	10	90	10	500	2.20 / 1.50	1.10 / 0.90

Energy Compensated GM Tubes

For highly efficient detection Global Nucleonics offers full sized energy compensated GM tubes.

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Energy Compensated Miniature GM Tubes Specs

Detector	Radiation Detected	Cs-137 Photon Response (cpm/mR/h)	Max. Shielded background (cpm)	Max. Dead Time (u sec)	Dose Rate Limit (R/h)	Suggested Operating Voltage (volts)	Max. /Effective Length (inches)	Max. /Effective Diameter (inches)
ZP1301	γ	19	1	13	2,000	550	0.91 / 0.28	0.54 / 0.19
ZP1313	γ	85	2	15	400	575	1.50 / 0.63	0.35 / 0.19
GN1321	γ	475	12	45	10	575	2.17 / 1.10	0.55 / 0.31

High Sensitivity Energy Compensated GM Tubes Specs

Detector	Radiation Detected	Cs-137 Photon Response (cpm/mR/h)	Max. Shielded background (cpm)	Max. Dead Time (u sec)	Dose Rate Limit (R/h)	Suggested Operating Voltage (volts)	Max. /Effective Length (inches)	Max. /Effective Diameter (inches)
GN1201	γ	1400	10	90	10	500	2.30 / 1.60	1.10 / 0.90
GN1211/02	γ	5200	50	200	1	450	6.70 / 5.51	0.77 / 0.35
GN1221	γ	9000	60	210	0.3	450	10.6 / 9.45	0.75 / 0.73
GN1402	α, β, γ	1300	10	100	10	500	2.20 / 1.50	0.75 / 0.74

Cylindrical Thick and Thin Wall GM Tubes

These tubes can be made in a multitude of lengths or diameters for use in varying radiation energy levels.

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Cylindrical Thick and Thin Wall GM Tubes group

Cylindrical Thick Wall GM Tubes Specs

Detector	Radiation Detected	Cs-137 Photon Response (cpm/mR/h)	Max. Shielded background (cpm)	Max. Dead Time (u sec)	Dose Rate Limit (R/h)	Suggested Operating Voltage (volts)	Max. /Effective Length (inches)	Max. /Effective Diameter (inches)
GN1200	γ	1400	10	90	10	500	2.20 / 1.60	0.67 / 0.57
GN1210	γ	5200	50	200	1	450	6.70 / 5.51	0.94 / 0.90
GN1220	γ	9000	60	210	0.3	450	10.6 / 9.50	0.94 / 0.90
GN310/3P	γ	4700	50	100	1	900	7.80 / 5.80	0.63 / 0.60

Cylindrical Thin Wall GM Tubes Specs

Detector	Radiation Detected	Cs-137 Photon Response (cpm/mR/h)	Max. Shielded background (cpm)	Max. Dead Time (u sec)	Dose Rate Limit (R/h)	Suggested Operating Voltage (volts)	Max. /Effective Length (inches)	Max. /Effective Diameter (inches)
GN106/3P	β, γ	2200	30	100	1	900	5.60 / 3.80	0.63 / 0.60
GN107-HT	β, γ	5200	60	100	1	900	10.8 / 8.90	0.63 / 0.60
GN112	β, γ	1500	20	150	1	900	4.30 / 2.30	0.94 / 0.73
GN112X	β, γ	1100	20	150	1	900	4.30 / 2.30	0.94 / 0.73
GN114	β, γ	800	12	100	2	900	3.80 / 1.20	0.63 / 0.60
GN119HS	β, γ	4800	50	150	0.5	900	7.40 / 5.50	0.94 / 0.73

High Temperature / Ruggedized GM Tubes

Global Nucleonics specializes in platinum plated high sensitivity GM tubes.

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High Sensitivity Platinum Plated GM Tubes Specs

Detector	Radiation Detected	Cs-137 Photon Response (cpm/mR/h)	Max. Shielded background (cpm)	Max. Dead Time (u sec)	Dose Rate Limit (R/h)	Suggested Operating Voltage (volts)	Max. /Effective Length (inches)	Max. /Effective Diameter (inches)
GNP334-6.6	γ	7850	25	150	1	900	6.90 / 5.60	0.62 / 0.60
GNP334-6/3P	γ	7050	25	150	1	900	6.70 / 5.00	0.62 / 0.60
GNP358-6/3P	γ	4860	20	100	1	900	6.40 / 4.50	0.62 / 0.60
GNP358-4R	γ	4500	20	100	1	900	6.90 / 4.00	0.62 / 0.60
GNP358-9R	γ	10000	40	100	1	900	11.9 / 9.00	0.62 / 0.60
GNP358-6RH	γ	4860	20	100	1	900	5.90 / 4.50	0.62 / 0.60
GNP358-7RH	γ	7600	30	100	1	900	8.90 / 6.70	0.62 / 0.60
GNP358-9RH	γ	10000	40	100	1	900	11.0 / 9.00	0.62 / 0.60
GNP358-1.1	γ	1250	8	100	10	450	2.20 / 1.10	0.62 / 0.60
GNP358-1.8	γ	2100	10	100	10	750	2.90 / 1.80	0.62 / 0.60
GNP358-3.5	γ	2800	12	100	10	900	3.80 / 2.50	0.62 / 0.60

GM Tubes - Miniature

When space is at a premium miniature GM tubes can detect alpha, beta and gamma radiation.

These tubes can be used in a variety of applications and environments and come in both energy uncompensated and energy compensated designs.

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Miniature GM Tubes Specs

Detector	Radiation Detected	Cs-137 Photon Response (cpm/mR/h)	Max. Shielded background (cpm)	Max. Dead Time (u sec)	Dose Rate Limit (R/h)	Suggested Operating Voltage (volts)	Max. /Effective Length (inches)	Max. /Effective Diameter (inches)
ZP1300	β, γ	19	1	11	2,000	550	0.91 / 0.28	0.24 / 0.19
ZP1310	β, γ	85	2	15	500	575	1.40 / 0.63	0.24 / 0.19
GN1320	β, γ	475	12	45	20	575	2.00 / 1.10	0.31 / 0.31

Need Custom Specs?

Global Nucleonics has the design and engineering capability to produce detectors to your specifications.